diff --git a/kotlin-native/Interop/StubGenerator/src/main/kotlin/org/jetbrains/kotlin/native/interop/gen/StubIrMetadataEmitter.kt b/kotlin-native/Interop/StubGenerator/src/main/kotlin/org/jetbrains/kotlin/native/interop/gen/StubIrMetadataEmitter.kt
index 7ec9f8e9c8f..854b09a89da 100644
--- a/kotlin-native/Interop/StubGenerator/src/main/kotlin/org/jetbrains/kotlin/native/interop/gen/StubIrMetadataEmitter.kt
+++ b/kotlin-native/Interop/StubGenerator/src/main/kotlin/org/jetbrains/kotlin/native/interop/gen/StubIrMetadataEmitter.kt
@@ -534,28 +534,28 @@ private class MappingExtensions(
         TypeArgument.Variance.OUT -> KmVariance.OUT
     }
 
-    fun ConstantStub.mapToAnnotationArgument(): KmAnnotationArgument<*> = when (this) {
+    fun ConstantStub.mapToAnnotationArgument(): KmAnnotationArgument = when (this) {
         is StringConstantStub -> KmAnnotationArgument.StringValue(value)
         is IntegralConstantStub -> when (size) {
             1 -> if (isSigned) {
                 KmAnnotationArgument.ByteValue(value.toByte())
             } else {
-                KmAnnotationArgument.UByteValue(value.toByte())
+                KmAnnotationArgument.UByteValue(value.toUByte())
             }
             2 -> if (isSigned) {
                 KmAnnotationArgument.ShortValue(value.toShort())
             } else {
-                KmAnnotationArgument.UShortValue(value.toShort())
+                KmAnnotationArgument.UShortValue(value.toUShort())
             }
             4 -> if (isSigned) {
                 KmAnnotationArgument.IntValue(value.toInt())
             } else {
-                KmAnnotationArgument.UIntValue(value.toInt())
+                KmAnnotationArgument.UIntValue(value.toUInt())
             }
             8 -> if (isSigned) {
                 KmAnnotationArgument.LongValue(value)
             } else {
-                KmAnnotationArgument.ULongValue(value)
+                KmAnnotationArgument.ULongValue(value.toULong())
             }
 
             else -> error("Integral constant of value $value with unexpected size of $size.")
diff --git a/libraries/kotlinx-metadata/jvm/ChangeLog.md b/libraries/kotlinx-metadata/jvm/ChangeLog.md
index 20bea14f5b9..b2e0c6dc769 100644
--- a/libraries/kotlinx-metadata/jvm/ChangeLog.md
+++ b/libraries/kotlinx-metadata/jvm/ChangeLog.md
@@ -4,6 +4,14 @@
 
 - Update to Kotlin 1.5 with metadata version 1.5.
   Note: metadata of version 1.5 is readable by Kotlin compiler/reflection of versions 1.4 and later.
+- Breaking change: improve API of annotation arguments.
+  `KmAnnotationArgument` doesn't have `val value: T` anymore, it was moved to a subclass named `KmAnnotationArgument.LiteralValue<T>`.
+  The property `value` is:
+  - renamed to `annotation` in `AnnotationValue`
+  - renamed to `elements` in `ArrayValue`
+  - removed in favor of `enumClassName`/`enumEntryName` in `EnumValue`
+  - removed in favor of `className`/`arrayDimensionCount` in `KClassValue`
+  - changed type from signed to unsigned integer types in `UByteValue`, `UShortValue`, `UIntValue`, `ULongValue`
 - [`KT-44783`](https://youtrack.jetbrains.com/issue/KT-44783) Add Flag.IS_VALUE for value classes
   - Breaking change: `Flag.IS_INLINE` is deprecated, use `Flag.IS_VALUE` instead
 - Breaking change: deprecate `KotlinClassHeader.bytecodeVersion` and `KotlinClassHeader`'s constructor that takes a bytecode version array.
diff --git a/libraries/kotlinx-metadata/klib/src/kotlinx/metadata/klib/impl/klibExtensionNodes.kt b/libraries/kotlinx-metadata/klib/src/kotlinx/metadata/klib/impl/klibExtensionNodes.kt
index 36c8ebbb726..d65bd3066b9 100644
--- a/libraries/kotlinx-metadata/klib/src/kotlinx/metadata/klib/impl/klibExtensionNodes.kt
+++ b/libraries/kotlinx-metadata/klib/src/kotlinx/metadata/klib/impl/klibExtensionNodes.kt
@@ -118,7 +118,7 @@ internal class KlibPropertyExtension : KlibPropertyExtensionVisitor(), KmPropert
     val setterAnnotations: MutableList<KmAnnotation> = mutableListOf()
     var uniqId: UniqId? = null
     var file: Int? = null
-    var compileTimeValue: KmAnnotationArgument<*>? = null
+    var compileTimeValue: KmAnnotationArgument? = null
 
     override fun visitAnnotation(annotation: KmAnnotation) {
         annotations += annotation
@@ -140,7 +140,7 @@ internal class KlibPropertyExtension : KlibPropertyExtensionVisitor(), KmPropert
         this.uniqId = uniqId
     }
 
-    override fun visitCompileTimeValue(value: KmAnnotationArgument<*>) {
+    override fun visitCompileTimeValue(value: KmAnnotationArgument) {
         this.compileTimeValue = value
     }
 
diff --git a/libraries/kotlinx-metadata/klib/src/kotlinx/metadata/klib/impl/klibMetadataExtensions.kt b/libraries/kotlinx-metadata/klib/src/kotlinx/metadata/klib/impl/klibMetadataExtensions.kt
index a13ded0cd4b..fa69ba6ed99 100644
--- a/libraries/kotlinx-metadata/klib/src/kotlinx/metadata/klib/impl/klibMetadataExtensions.kt
+++ b/libraries/kotlinx-metadata/klib/src/kotlinx/metadata/klib/impl/klibMetadataExtensions.kt
@@ -299,7 +299,7 @@ internal class KlibMetadataExtensions : MetadataExtensions {
                 )
             }
 
-            override fun visitCompileTimeValue(value: KmAnnotationArgument<*>) {
+            override fun visitCompileTimeValue(value: KmAnnotationArgument) {
                 proto.setExtension(
                     KlibMetadataProtoBuf.compileTimeValue,
                     value.writeAnnotationArgument(c.strings).build()
diff --git a/libraries/kotlinx-metadata/klib/src/kotlinx/metadata/klib/klibExtensions.kt b/libraries/kotlinx-metadata/klib/src/kotlinx/metadata/klib/klibExtensions.kt
index 9050f916e5a..f255f5855b9 100644
--- a/libraries/kotlinx-metadata/klib/src/kotlinx/metadata/klib/klibExtensions.kt
+++ b/libraries/kotlinx-metadata/klib/src/kotlinx/metadata/klib/klibExtensions.kt
@@ -62,7 +62,7 @@ var KmProperty.file: Int?
         klibExtensions.file = value
     }
 
-var KmProperty.compileTimeValue: KmAnnotationArgument<*>?
+var KmProperty.compileTimeValue: KmAnnotationArgument?
     get() = klibExtensions.compileTimeValue
     set(value) {
         klibExtensions.compileTimeValue = value
diff --git a/libraries/kotlinx-metadata/klib/src/kotlinx/metadata/klib/klibMetadataExtensionVisitors.kt b/libraries/kotlinx-metadata/klib/src/kotlinx/metadata/klib/klibMetadataExtensionVisitors.kt
index 56e4194a650..32a3a4187fc 100644
--- a/libraries/kotlinx-metadata/klib/src/kotlinx/metadata/klib/klibMetadataExtensionVisitors.kt
+++ b/libraries/kotlinx-metadata/klib/src/kotlinx/metadata/klib/klibMetadataExtensionVisitors.kt
@@ -65,7 +65,7 @@ abstract class KlibPropertyExtensionVisitor : KmPropertyExtensionVisitor {
 
     abstract fun visitUniqId(uniqId: UniqId)
 
-    abstract fun visitCompileTimeValue(value: KmAnnotationArgument<*>)
+    abstract fun visitCompileTimeValue(value: KmAnnotationArgument)
 
     override val type: KmExtensionType
         get() = TYPE
diff --git a/libraries/kotlinx-metadata/src/kotlinx/metadata/annotations.kt b/libraries/kotlinx-metadata/src/kotlinx/metadata/annotations.kt
index 132adaf815c..6a8ee598b9b 100644
--- a/libraries/kotlinx-metadata/src/kotlinx/metadata/annotations.kt
+++ b/libraries/kotlinx-metadata/src/kotlinx/metadata/annotations.kt
@@ -15,43 +15,53 @@ package kotlinx.metadata
  * @param arguments explicitly specified arguments to the annotation; does not include default values for annotation parameters
  *                  (specified in the annotation class declaration)
  */
-data class KmAnnotation(val className: ClassName, val arguments: Map<String, KmAnnotationArgument<*>>)
+data class KmAnnotation(val className: ClassName, val arguments: Map<String, KmAnnotationArgument>)
 
 /**
  * Represents an argument to the annotation.
- *
- * @param T the type of the value of this argument
  */
-sealed class KmAnnotationArgument<out T : Any> {
+sealed class KmAnnotationArgument {
     /**
-     * The value of this argument.
+     * A kind of annotation argument, whose value is directly accessible via [value].
+     * This is possible for annotation arguments of primitive types, unsigned types and strings.
+     *
+     * @param T the type of the value of this argument
      */
-    abstract val value: T
-
-    data class ByteValue(override val value: Byte) : KmAnnotationArgument<Byte>()
-    data class CharValue(override val value: Char) : KmAnnotationArgument<Char>()
-    data class ShortValue(override val value: Short) : KmAnnotationArgument<Short>()
-    data class IntValue(override val value: Int) : KmAnnotationArgument<Int>()
-    data class LongValue(override val value: Long) : KmAnnotationArgument<Long>()
-    data class FloatValue(override val value: Float) : KmAnnotationArgument<Float>()
-    data class DoubleValue(override val value: Double) : KmAnnotationArgument<Double>()
-    data class BooleanValue(override val value: Boolean) : KmAnnotationArgument<Boolean>()
-
-    data class UByteValue(override val value: Byte) : KmAnnotationArgument<Byte>()
-    data class UShortValue(override val value: Short) : KmAnnotationArgument<Short>()
-    data class UIntValue(override val value: Int) : KmAnnotationArgument<Int>()
-    data class ULongValue(override val value: Long) : KmAnnotationArgument<Long>()
-
-    data class StringValue(override val value: String) : KmAnnotationArgument<String>()
-
-    data class KClassValue(val className: ClassName, val arrayDimensionCount: Int) : KmAnnotationArgument<String>() {
-        override val value: String = className + "[]".repeat(arrayDimensionCount)
+    sealed class LiteralValue<out T : Any> : KmAnnotationArgument() {
+        /**
+         * The value of this argument.
+         */
+        abstract val value: T
     }
 
-    data class EnumValue(val enumClassName: ClassName, val enumEntryName: String) : KmAnnotationArgument<String>() {
-        override val value: String = "$enumClassName.$enumEntryName"
-    }
+    data class ByteValue(override val value: Byte) : LiteralValue<Byte>()
+    data class CharValue(override val value: Char) : LiteralValue<Char>()
+    data class ShortValue(override val value: Short) : LiteralValue<Short>()
+    data class IntValue(override val value: Int) : LiteralValue<Int>()
+    data class LongValue(override val value: Long) : LiteralValue<Long>()
+    data class FloatValue(override val value: Float) : LiteralValue<Float>()
+    data class DoubleValue(override val value: Double) : LiteralValue<Double>()
+    data class BooleanValue(override val value: Boolean) : LiteralValue<Boolean>()
 
-    data class AnnotationValue(override val value: KmAnnotation) : KmAnnotationArgument<KmAnnotation>()
-    data class ArrayValue(override val value: List<KmAnnotationArgument<*>>) : KmAnnotationArgument<List<KmAnnotationArgument<*>>>()
+    // TODO: remove @ExperimentalUnsignedTypes once bootstrap stdlib has stable unsigned types.
+    @ExperimentalUnsignedTypes
+    data class UByteValue(override val value: UByte) : LiteralValue<UByte>()
+
+    @ExperimentalUnsignedTypes
+    data class UShortValue(override val value: UShort) : LiteralValue<UShort>()
+
+    @ExperimentalUnsignedTypes
+    data class UIntValue(override val value: UInt) : LiteralValue<UInt>()
+
+    @ExperimentalUnsignedTypes
+    data class ULongValue(override val value: ULong) : LiteralValue<ULong>()
+
+    data class StringValue(override val value: String) : LiteralValue<String>()
+
+    data class KClassValue(val className: ClassName, val arrayDimensionCount: Int) : KmAnnotationArgument()
+
+    data class EnumValue(val enumClassName: ClassName, val enumEntryName: String) : KmAnnotationArgument()
+
+    data class AnnotationValue(val annotation: KmAnnotation) : KmAnnotationArgument()
+    data class ArrayValue(val elements: List<KmAnnotationArgument>) : KmAnnotationArgument()
 }
diff --git a/libraries/kotlinx-metadata/src/kotlinx/metadata/impl/readUtils.kt b/libraries/kotlinx-metadata/src/kotlinx/metadata/impl/readUtils.kt
index 7fb1dfc6f15..4800ef949cd 100644
--- a/libraries/kotlinx-metadata/src/kotlinx/metadata/impl/readUtils.kt
+++ b/libraries/kotlinx-metadata/src/kotlinx/metadata/impl/readUtils.kt
@@ -23,13 +23,14 @@ fun ProtoBuf.Annotation.readAnnotation(strings: NameResolver): KmAnnotation =
         }.toMap()
     )
 
-fun ProtoBuf.Annotation.Argument.Value.readAnnotationArgument(strings: NameResolver): KmAnnotationArgument<*>? {
+@OptIn(ExperimentalUnsignedTypes::class)
+fun ProtoBuf.Annotation.Argument.Value.readAnnotationArgument(strings: NameResolver): KmAnnotationArgument? {
     if (Flags.IS_UNSIGNED[flags]) {
         return when (type) {
-            BYTE -> KmAnnotationArgument.UByteValue(intValue.toByte())
-            SHORT -> KmAnnotationArgument.UShortValue(intValue.toShort())
-            INT -> KmAnnotationArgument.UIntValue(intValue.toInt())
-            LONG -> KmAnnotationArgument.ULongValue(intValue)
+            BYTE -> KmAnnotationArgument.UByteValue(intValue.toByte().toUByte())
+            SHORT -> KmAnnotationArgument.UShortValue(intValue.toShort().toUShort())
+            INT -> KmAnnotationArgument.UIntValue(intValue.toInt().toUInt())
+            LONG -> KmAnnotationArgument.ULongValue(intValue.toULong())
             else -> error("Cannot read value of unsigned type: $type")
         }
     }
diff --git a/libraries/kotlinx-metadata/src/kotlinx/metadata/impl/writeUtils.kt b/libraries/kotlinx-metadata/src/kotlinx/metadata/impl/writeUtils.kt
index 5023b0103b0..edffaff6a86 100644
--- a/libraries/kotlinx-metadata/src/kotlinx/metadata/impl/writeUtils.kt
+++ b/libraries/kotlinx-metadata/src/kotlinx/metadata/impl/writeUtils.kt
@@ -24,7 +24,8 @@ fun KmAnnotation.writeAnnotation(strings: StringTable): ProtoBuf.Annotation.Buil
         }
     }
 
-fun KmAnnotationArgument<*>.writeAnnotationArgument(strings: StringTable): ProtoBuf.Annotation.Argument.Value.Builder =
+@OptIn(ExperimentalUnsignedTypes::class)
+fun KmAnnotationArgument.writeAnnotationArgument(strings: StringTable): ProtoBuf.Annotation.Argument.Value.Builder =
     ProtoBuf.Annotation.Argument.Value.newBuilder().apply {
         when (this@writeAnnotationArgument) {
             is KmAnnotationArgument.ByteValue -> {
@@ -76,7 +77,7 @@ fun KmAnnotationArgument<*>.writeAnnotationArgument(strings: StringTable): Proto
             }
             is KmAnnotationArgument.ULongValue -> {
                 this.type = ProtoBuf.Annotation.Argument.Value.Type.LONG
-                this.intValue = value
+                this.intValue = value.toLong()
                 this.flags = Flags.IS_UNSIGNED.toFlags(true)
             }
             is KmAnnotationArgument.StringValue -> {
@@ -95,11 +96,11 @@ fun KmAnnotationArgument<*>.writeAnnotationArgument(strings: StringTable): Proto
             }
             is KmAnnotationArgument.AnnotationValue -> {
                 this.type = ProtoBuf.Annotation.Argument.Value.Type.ANNOTATION
-                this.annotation = value.writeAnnotation(strings).build()
+                this.annotation = this@writeAnnotationArgument.annotation.writeAnnotation(strings).build()
             }
             is KmAnnotationArgument.ArrayValue -> {
                 this.type = ProtoBuf.Annotation.Argument.Value.Type.ARRAY
-                for (element in value) {
+                for (element in elements) {
                     this.addArrayElement(element.writeAnnotationArgument(strings))
                 }
             }
diff --git a/libraries/tools/kotlinp/src/org/jetbrains/kotlin/kotlinp/printers.kt b/libraries/tools/kotlinp/src/org/jetbrains/kotlin/kotlinp/printers.kt
index 3607d314a19..15b3791cb0b 100644
--- a/libraries/tools/kotlinp/src/org/jetbrains/kotlin/kotlinp/printers.kt
+++ b/libraries/tools/kotlinp/src/org/jetbrains/kotlin/kotlinp/printers.kt
@@ -446,7 +446,7 @@ private fun renderAnnotation(annotation: KmAnnotation): String =
         }
 
 @OptIn(ExperimentalUnsignedTypes::class)
-private fun renderAnnotationArgument(arg: KmAnnotationArgument<*>): String =
+private fun renderAnnotationArgument(arg: KmAnnotationArgument): String =
     when (arg) {
         is KmAnnotationArgument.ByteValue -> arg.value.toString() + ".toByte()"
         is KmAnnotationArgument.CharValue -> "'${arg.value.toString().sanitize(quote = '\'')}'"
@@ -455,10 +455,10 @@ private fun renderAnnotationArgument(arg: KmAnnotationArgument<*>): String =
         is KmAnnotationArgument.LongValue -> arg.value.toString() + "L"
         is KmAnnotationArgument.FloatValue -> arg.value.toString() + "f"
         is KmAnnotationArgument.DoubleValue -> arg.value.toString()
-        is KmAnnotationArgument.UByteValue -> arg.value.toUByte().toString() + ".toUByte()"
-        is KmAnnotationArgument.UShortValue -> arg.value.toUShort().toString() + ".toUShort()"
-        is KmAnnotationArgument.UIntValue -> arg.value.toUInt().toString() + "u"
-        is KmAnnotationArgument.ULongValue -> arg.value.toULong().toString() + "uL"
+        is KmAnnotationArgument.UByteValue -> arg.value.toString() + ".toUByte()"
+        is KmAnnotationArgument.UShortValue -> arg.value.toString() + ".toUShort()"
+        is KmAnnotationArgument.UIntValue -> arg.value.toString() + "u"
+        is KmAnnotationArgument.ULongValue -> arg.value.toString() + "uL"
         is KmAnnotationArgument.BooleanValue -> arg.value.toString()
         is KmAnnotationArgument.StringValue -> "\"${arg.value.sanitize(quote = '"')}\""
         is KmAnnotationArgument.KClassValue -> buildString {
@@ -466,14 +466,14 @@ private fun renderAnnotationArgument(arg: KmAnnotationArgument<*>): String =
             append(arg.className).append("::class")
             repeat(arg.arrayDimensionCount) { append(">") }
         }
-        is KmAnnotationArgument.EnumValue -> arg.value
-        is KmAnnotationArgument.AnnotationValue -> arg.value.let { annotation ->
+        is KmAnnotationArgument.EnumValue -> "${arg.enumClassName}.${arg.enumEntryName}"
+        is KmAnnotationArgument.AnnotationValue -> arg.annotation.let { annotation ->
             val args = annotation.arguments.entries.joinToString { (name, argument) ->
                 "$name = ${renderAnnotationArgument(argument)}"
             }
             "${annotation.className}($args)"
         }
-        is KmAnnotationArgument.ArrayValue -> arg.value.joinToString(prefix = "[", postfix = "]", transform = ::renderAnnotationArgument)
+        is KmAnnotationArgument.ArrayValue -> arg.elements.joinToString(prefix = "[", postfix = "]", transform = ::renderAnnotationArgument)
     }
 
 private fun String.sanitize(quote: Char): String =
diff --git a/native/commonizer/src/org/jetbrains/kotlin/commonizer/cir/CirConstantValue.kt b/native/commonizer/src/org/jetbrains/kotlin/commonizer/cir/CirConstantValue.kt
index ba12d69588c..e8b983752fc 100644
--- a/native/commonizer/src/org/jetbrains/kotlin/commonizer/cir/CirConstantValue.kt
+++ b/native/commonizer/src/org/jetbrains/kotlin/commonizer/cir/CirConstantValue.kt
@@ -16,10 +16,17 @@ sealed class CirConstantValue<out T> {
     data class IntValue(override val value: Int) : CirConstantValue<Int>()
     data class LongValue(override val value: Long) : CirConstantValue<Long>()
 
-    data class UByteValue(override val value: Byte) : CirConstantValue<Byte>()
-    data class UShortValue(override val value: Short) : CirConstantValue<Short>()
-    data class UIntValue(override val value: Int) : CirConstantValue<Int>()
-    data class ULongValue(override val value: Long) : CirConstantValue<Long>()
+    @ExperimentalUnsignedTypes
+    data class UByteValue(override val value: UByte) : CirConstantValue<UByte>()
+
+    @ExperimentalUnsignedTypes
+    data class UShortValue(override val value: UShort) : CirConstantValue<UShort>()
+
+    @ExperimentalUnsignedTypes
+    data class UIntValue(override val value: UInt) : CirConstantValue<UInt>()
+
+    @ExperimentalUnsignedTypes
+    data class ULongValue(override val value: ULong) : CirConstantValue<ULong>()
 
     data class FloatValue(override val value: Float) : CirConstantValue<Float>()
     data class DoubleValue(override val value: Double) : CirConstantValue<Double>()
diff --git a/native/commonizer/src/org/jetbrains/kotlin/commonizer/metadata/CirDeserializers.kt b/native/commonizer/src/org/jetbrains/kotlin/commonizer/metadata/CirDeserializers.kt
index a8a2b9cefdf..4d23629abb1 100644
--- a/native/commonizer/src/org/jetbrains/kotlin/commonizer/metadata/CirDeserializers.kt
+++ b/native/commonizer/src/org/jetbrains/kotlin/commonizer/metadata/CirDeserializers.kt
@@ -11,10 +11,10 @@ import kotlinx.metadata.klib.annotations
 import kotlinx.metadata.klib.compileTimeValue
 import kotlinx.metadata.klib.getterAnnotations
 import kotlinx.metadata.klib.setterAnnotations
-import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.commonizer.cir.*
 import org.jetbrains.kotlin.commonizer.mergedtree.CirProvided
 import org.jetbrains.kotlin.commonizer.utils.*
+import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.types.Variance
 
 object CirDeserializers {
@@ -45,7 +45,7 @@ object CirDeserializers {
             isMarkedNullable = false
         )
 
-        val allValueArguments: Map<String, KmAnnotationArgument<*>> = source.arguments
+        val allValueArguments: Map<String, KmAnnotationArgument> = source.arguments
         if (allValueArguments.isEmpty())
             return CirAnnotation.createInterned(type = type, constantValueArguments = emptyMap(), annotationValueArguments = emptyMap())
 
@@ -55,7 +55,7 @@ object CirDeserializers {
         allValueArguments.forEach { (name, constantValue) ->
             val cirName = CirName.create(name)
             if (constantValue is KmAnnotationArgument.AnnotationValue)
-                annotationValueArguments[cirName] = annotation(source = constantValue.value, typeResolver)
+                annotationValueArguments[cirName] = annotation(source = constantValue.annotation, typeResolver)
             else
                 constantValueArguments[cirName] = constantValue(
                     constantValue = constantValue,
@@ -205,7 +205,7 @@ object CirDeserializers {
         )
 
     private fun constantValue(
-        constantValue: KmAnnotationArgument<*>?,
+        constantValue: KmAnnotationArgument?,
         constantName: CirName? = null,
         owner: Any,
     ): CirConstantValue<*> = constantValue(
@@ -213,8 +213,9 @@ object CirDeserializers {
         location = { "${owner::class.java}, $owner" + constantName?.toString()?.let { "[$it]" } }
     )
 
+    @OptIn(ExperimentalUnsignedTypes::class)
     private fun constantValue(
-        constantValue: KmAnnotationArgument<*>?,
+        constantValue: KmAnnotationArgument?,
         location: () -> String
     ): CirConstantValue<*> = when (constantValue) {
         null -> CirConstantValue.NullValue
@@ -242,7 +243,7 @@ object CirDeserializers {
         )
 
         is KmAnnotationArgument.ArrayValue -> CirConstantValue.ArrayValue(
-            constantValue.value.compactMapIndexed { index, innerConstantValue ->
+            constantValue.elements.compactMapIndexed { index, innerConstantValue ->
                 constantValue(
                     constantValue = innerConstantValue,
                     location = { "${location()}[$index]" }
diff --git a/native/commonizer/src/org/jetbrains/kotlin/commonizer/metadata/CirSerializers.kt b/native/commonizer/src/org/jetbrains/kotlin/commonizer/metadata/CirSerializers.kt
index 30f8f4a5e90..a6efe0acfd7 100644
--- a/native/commonizer/src/org/jetbrains/kotlin/commonizer/metadata/CirSerializers.kt
+++ b/native/commonizer/src/org/jetbrains/kotlin/commonizer/metadata/CirSerializers.kt
@@ -8,13 +8,13 @@ package org.jetbrains.kotlin.commonizer.metadata
 import kotlinx.metadata.*
 import kotlinx.metadata.klib.*
 import org.jetbrains.kotlin.backend.common.serialization.metadata.DynamicTypeDeserializer
-import org.jetbrains.kotlin.descriptors.CallableMemberDescriptor
 import org.jetbrains.kotlin.commonizer.cir.*
 import org.jetbrains.kotlin.commonizer.mergedtree.*
 import org.jetbrains.kotlin.commonizer.metadata.TypeAliasExpansion.*
 import org.jetbrains.kotlin.commonizer.utils.DEFAULT_SETTER_VALUE_NAME
 import org.jetbrains.kotlin.commonizer.utils.SPECIAL_CLASS_WITHOUT_SUPERTYPES_CLASS_NAMES
 import org.jetbrains.kotlin.commonizer.utils.compactMap
+import org.jetbrains.kotlin.descriptors.CallableMemberDescriptor
 import org.jetbrains.kotlin.types.Variance
 
 internal fun CirModule.serializeModule(
@@ -195,7 +195,7 @@ internal fun CirFunction.serializeFunction(
 }
 
 private fun CirAnnotation.serializeAnnotation(): KmAnnotation {
-    val arguments = LinkedHashMap<String, KmAnnotationArgument<*>>(constantValueArguments.size + annotationValueArguments.size, 1F)
+    val arguments = LinkedHashMap<String, KmAnnotationArgument>(constantValueArguments.size + annotationValueArguments.size, 1F)
 
     constantValueArguments.forEach { (name: CirName, value: CirConstantValue<*>) ->
         arguments[name.name] = value.serializeConstantValue()
@@ -212,7 +212,8 @@ private fun CirAnnotation.serializeAnnotation(): KmAnnotation {
     )
 }
 
-private fun CirConstantValue<*>.serializeConstantValue(): KmAnnotationArgument<*>? = when (this) {
+@OptIn(ExperimentalUnsignedTypes::class)
+private fun CirConstantValue<*>.serializeConstantValue(): KmAnnotationArgument? = when (this) {
     is CirConstantValue.StringValue -> KmAnnotationArgument.StringValue(value)
     is CirConstantValue.CharValue -> KmAnnotationArgument.CharValue(value)