diff --git a/plugins/kotlin-serialization/kotlin-serialization-compiler/src/org/jetbrains/kotlinx/serialization/compiler/backend/common/SerializableCodegen.kt b/plugins/kotlin-serialization/kotlin-serialization-compiler/src/org/jetbrains/kotlinx/serialization/compiler/backend/common/SerializableCodegen.kt
index 03f5bdb6109..7093fd314e2 100644
--- a/plugins/kotlin-serialization/kotlin-serialization-compiler/src/org/jetbrains/kotlinx/serialization/compiler/backend/common/SerializableCodegen.kt
+++ b/plugins/kotlin-serialization/kotlin-serialization-compiler/src/org/jetbrains/kotlinx/serialization/compiler/backend/common/SerializableCodegen.kt
@@ -10,6 +10,7 @@ import org.jetbrains.kotlin.incremental.components.NoLookupLocation
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.resolve.BindingContext
 import org.jetbrains.kotlin.resolve.descriptorUtil.secondaryConstructors
+import org.jetbrains.kotlin.resolve.isInlineClass
 import org.jetbrains.kotlin.types.typeUtil.isUnit
 import org.jetbrains.kotlinx.serialization.compiler.resolve.*
 
@@ -25,7 +26,7 @@ abstract class SerializableCodegen(
     }
 
     private inline fun ClassDescriptor.shouldHaveSpecificSyntheticMethods(functionPresenceChecker: () -> FunctionDescriptor?) =
-        !isInline && (isAbstractSerializableClass() || isSealedSerializableClass() || functionPresenceChecker() != null)
+        !isInlineClass() && (isAbstractSerializableClass() || isSealedSerializableClass() || functionPresenceChecker() != null)
 
     private fun generateSyntheticInternalConstructor() {
         val serializerDescriptor = serializableDescriptor.classSerializer ?: return
diff --git a/plugins/kotlin-serialization/kotlin-serialization-compiler/src/org/jetbrains/kotlinx/serialization/compiler/backend/ir/SerializerIrGenerator.kt b/plugins/kotlin-serialization/kotlin-serialization-compiler/src/org/jetbrains/kotlinx/serialization/compiler/backend/ir/SerializerIrGenerator.kt
index 924c60018d4..97fd07d4b7a 100644
--- a/plugins/kotlin-serialization/kotlin-serialization-compiler/src/org/jetbrains/kotlinx/serialization/compiler/backend/ir/SerializerIrGenerator.kt
+++ b/plugins/kotlin-serialization/kotlin-serialization-compiler/src/org/jetbrains/kotlinx/serialization/compiler/backend/ir/SerializerIrGenerator.kt
@@ -24,6 +24,7 @@ import org.jetbrains.kotlin.platform.jvm.isJvm
 import org.jetbrains.kotlin.resolve.BindingContext
 import org.jetbrains.kotlin.resolve.calls.components.hasDefaultValue
 import org.jetbrains.kotlin.resolve.descriptorUtil.fqNameSafe
+import org.jetbrains.kotlin.resolve.isInlineClass
 import org.jetbrains.kotlin.util.OperatorNameConventions
 import org.jetbrains.kotlin.utils.addToStdlib.cast
 import org.jetbrains.kotlinx.serialization.compiler.backend.common.SerialTypeInfo
@@ -586,7 +587,7 @@ open class SerializerIrGenerator(
             val serializableDesc = getSerializableClassDescriptorBySerializer(irClass.symbol.descriptor) ?: return
             val generator = when {
                 serializableDesc.isSerializableEnum() -> SerializerForEnumsGenerator(irClass, context, bindingContext, serialInfoJvmGenerator)
-                serializableDesc.isInline -> SerializerForInlineClassGenerator(irClass, context, bindingContext, serialInfoJvmGenerator)
+                serializableDesc.isInlineClass() -> SerializerForInlineClassGenerator(irClass, context, bindingContext, serialInfoJvmGenerator)
                 else -> SerializerIrGenerator(irClass, context, bindingContext, metadataPlugin, serialInfoJvmGenerator)
             }
             generator.generate()
diff --git a/plugins/kotlin-serialization/kotlin-serialization-compiler/src/org/jetbrains/kotlinx/serialization/compiler/extensions/SerializationResolveExtension.kt b/plugins/kotlin-serialization/kotlin-serialization-compiler/src/org/jetbrains/kotlinx/serialization/compiler/extensions/SerializationResolveExtension.kt
index 84ab5f929b5..ed757d48e60 100644
--- a/plugins/kotlin-serialization/kotlin-serialization-compiler/src/org/jetbrains/kotlinx/serialization/compiler/extensions/SerializationResolveExtension.kt
+++ b/plugins/kotlin-serialization/kotlin-serialization-compiler/src/org/jetbrains/kotlinx/serialization/compiler/extensions/SerializationResolveExtension.kt
@@ -39,7 +39,7 @@ open class SerializationResolveExtension @JvmOverloads constructor(val metadataP
     override fun getSyntheticFunctionNames(thisDescriptor: ClassDescriptor): List<Name> = when {
         thisDescriptor.isSerializableObject || thisDescriptor.isCompanionObject && getSerializableClassDescriptorByCompanion(thisDescriptor) != null ->
             listOf(SerialEntityNames.SERIALIZER_PROVIDER_NAME)
-        thisDescriptor.isInternalSerializable && thisDescriptor.platform?.isJvm() == true && !hasCustomizedSerializeMethod(thisDescriptor) -> {
+        thisDescriptor.isInternalSerializable && !thisDescriptor.isInlineClass() && thisDescriptor.platform?.isJvm() == true && !hasCustomizedSerializeMethod(thisDescriptor) -> {
             // add write$Self, but only if .serialize was not customized in companion.
             // It works not only on JVM, but I see no reason to enable it on other platforms —
             // private fields there have no access control, and additional function
@@ -93,7 +93,7 @@ open class SerializationResolveExtension @JvmOverloads constructor(val metadataP
         if (thisDescriptor.isInternalSerializable) {
             // do not add synthetic deserialization constructor if .deserialize method is customized
             if (thisDescriptor.hasCompanionObjectAsSerializer && SerializerCodegen.getSyntheticLoadMember(thisDescriptor.companionObjectDescriptor!!) == null) return
-            if (thisDescriptor.isInline) return
+            if (thisDescriptor.isInlineClass()) return
             result.add(KSerializerDescriptorResolver.createLoadConstructorDescriptor(thisDescriptor, bindingContext, metadataPlugin))
         }
     }