diff --git a/compiler/serialization/src/org/jetbrains/kotlin/serialization/DescriptorSerializer.kt b/compiler/serialization/src/org/jetbrains/kotlin/serialization/DescriptorSerializer.kt
index 96acc8e1dc2..42358f48bbb 100644
--- a/compiler/serialization/src/org/jetbrains/kotlin/serialization/DescriptorSerializer.kt
+++ b/compiler/serialization/src/org/jetbrains/kotlin/serialization/DescriptorSerializer.kt
@@ -33,9 +33,11 @@ import org.jetbrains.kotlin.resolve.constants.IntValue
 import org.jetbrains.kotlin.resolve.constants.NullValue
 import org.jetbrains.kotlin.resolve.constants.StringValue
 import org.jetbrains.kotlin.resolve.descriptorUtil.nonSourceAnnotations
+import org.jetbrains.kotlin.resolve.isInlineClassType
 import org.jetbrains.kotlin.serialization.deserialization.ProtoEnumFlags
 import org.jetbrains.kotlin.types.*
 import org.jetbrains.kotlin.types.typeUtil.contains
+import org.jetbrains.kotlin.types.typeUtil.immediateSupertypes
 import java.util.*
 
 class DescriptorSerializer private constructor(
@@ -145,6 +147,8 @@ class DescriptorSerializer private constructor(
 
         extension.serializeClass(classDescriptor, builder, versionRequirementTable)
 
+        writeVersionRequirementForInlineClasses(classDescriptor, builder, versionRequirementTable)
+
         val versionRequirementTableProto = versionRequirementTable.serialize()
         if (versionRequirementTableProto != null) {
             builder.versionRequirementTable = versionRequirementTableProto
@@ -152,6 +156,28 @@ class DescriptorSerializer private constructor(
         return builder
     }
 
+    private fun writeVersionRequirementForInlineClasses(
+        classDescriptor: ClassDescriptor,
+        builder: ProtoBuf.Class.Builder,
+        versionRequirementTable: MutableVersionRequirementTable
+    ) {
+        if (!classDescriptor.isInline && !classDescriptor.hasInlineClassTypesInSignature()) return
+
+        builder.addVersionRequirement(
+            DescriptorSerializer.writeLanguageVersionRequirement(LanguageFeature.InlineClasses, versionRequirementTable)
+        )
+    }
+
+    private fun ClassDescriptor.hasInlineClassTypesInSignature(): Boolean {
+        for (typeParameter in declaredTypeParameters) {
+            if (typeParameter.upperBounds.any { it.contains(UnwrappedType::isInlineClassType) }) return true
+        }
+
+        if (defaultType.immediateSupertypes().any { supertype -> supertype.contains(UnwrappedType::isInlineClassType) }) return true
+
+        return false
+    }
+
     fun propertyProto(descriptor: PropertyDescriptor): ProtoBuf.Property.Builder {
         val builder = ProtoBuf.Property.newBuilder()
 
@@ -239,6 +265,10 @@ class DescriptorSerializer private constructor(
             builder.addVersionRequirement(writeVersionRequirementDependingOnCoroutinesVersion())
         }
 
+        if (descriptor.hasInlineClassTypesInSignature()) {
+            builder.addVersionRequirement(writeVersionRequirement(LanguageFeature.InlineClasses))
+        }
+
         extension.serializeProperty(descriptor, builder, versionRequirementTable)
 
         return builder
@@ -308,6 +338,10 @@ class DescriptorSerializer private constructor(
             builder.addVersionRequirement(writeVersionRequirementDependingOnCoroutinesVersion())
         }
 
+        if (descriptor.hasInlineClassTypesInSignature()) {
+            builder.addVersionRequirement(writeVersionRequirement(LanguageFeature.InlineClasses))
+        }
+
         contractSerializer.serializeContractOfFunctionIfAny(descriptor, builder, this)
 
         extension.serializeFunction(descriptor, builder)
@@ -337,6 +371,10 @@ class DescriptorSerializer private constructor(
             builder.addVersionRequirement(writeVersionRequirementDependingOnCoroutinesVersion())
         }
 
+        if (descriptor.hasInlineClassTypesInSignature()) {
+            builder.addVersionRequirement(writeVersionRequirement(LanguageFeature.InlineClasses))
+        }
+
         extension.serializeConstructor(descriptor, builder)
 
         return builder
@@ -348,12 +386,20 @@ class DescriptorSerializer private constructor(
     private fun CallableMemberDescriptor.isSuspendOrHasSuspendTypesInSignature(): Boolean {
         if (this is FunctionDescriptor && isSuspend) return true
 
+        return allTypesFromSignature().any { type -> type.contains(UnwrappedType::isSuspendFunctionTypeOrSubtype) }
+    }
+
+    private fun CallableMemberDescriptor.hasInlineClassTypesInSignature(): Boolean {
+        return allTypesFromSignature().any { type -> type.contains(UnwrappedType::isInlineClassType) }
+    }
+
+    private fun CallableMemberDescriptor.allTypesFromSignature(): List<KotlinType> {
         return listOfNotNull(
-                extensionReceiverParameter?.type,
-                returnType,
-                *typeParameters.flatMap { it.upperBounds }.toTypedArray(),
-                *valueParameters.map(ValueParameterDescriptor::getType).toTypedArray()
-        ).any { type -> type.contains(UnwrappedType::isSuspendFunctionTypeOrSubtype) }
+            extensionReceiverParameter?.type,
+            returnType,
+            *typeParameters.flatMap { it.upperBounds }.toTypedArray(),
+            *valueParameters.map(ValueParameterDescriptor::getType).toTypedArray()
+        )
     }
 
     fun typeAliasProto(descriptor: TypeAliasDescriptor): ProtoBuf.TypeAlias.Builder {
@@ -614,15 +660,7 @@ class DescriptorSerializer private constructor(
     }
 
     private fun writeVersionRequirement(languageFeature: LanguageFeature): Int {
-        val languageVersion = languageFeature.sinceVersion!!
-        return writeVersionRequirement(
-            languageVersion.major, languageVersion.minor, 0,
-            ProtoBuf.VersionRequirement.VersionKind.LANGUAGE_VERSION
-        )
-    }
-
-    private fun writeVersionRequirement(major: Int, minor: Int, patch: Int, versionKind: ProtoBuf.VersionRequirement.VersionKind): Int {
-        return writeVersionRequirement(major, minor, patch, versionKind, versionRequirementTable)
+        return writeLanguageVersionRequirement(languageFeature, versionRequirementTable)
     }
 
     // Returns a list of indices into versionRequirementTable, or empty list if there's no @RequireKotlin on the descriptor
@@ -758,6 +796,18 @@ class DescriptorSerializer private constructor(
                     Collections.sort(this, MemberComparator.INSTANCE)
                 }
 
+        fun writeLanguageVersionRequirement(
+            languageFeature: LanguageFeature,
+            versionRequirementTable: MutableVersionRequirementTable
+        ): Int {
+            val languageVersion = languageFeature.sinceVersion!!
+            return writeVersionRequirement(
+                languageVersion.major, languageVersion.minor, 0,
+                ProtoBuf.VersionRequirement.VersionKind.LANGUAGE_VERSION,
+                versionRequirementTable
+            )
+        }
+
         fun writeVersionRequirement(
             major: Int,
             minor: Int,
diff --git a/compiler/testData/versionRequirement/inlineClassesAndRelevantDeclarations.kt b/compiler/testData/versionRequirement/inlineClassesAndRelevantDeclarations.kt
new file mode 100644
index 00000000000..62993fbcfd5
--- /dev/null
+++ b/compiler/testData/versionRequirement/inlineClassesAndRelevantDeclarations.kt
@@ -0,0 +1,18 @@
+package test
+
+@Suppress("UNSUPPORTED_FEATURE")
+inline class IC(val x: String)
+
+typealias ICAlias = IC
+
+class Ctor(ic: IC)
+
+fun simpleFun(f: IC) {}
+fun aliasedFun(f: ICAlias) {}
+
+val simpleProp: IC = IC("")
+
+fun result(r: List<Result<Any>?>) {}
+
+abstract class Foo : List<IC>
+interface Bar<T : IC>
diff --git a/compiler/tests/org/jetbrains/kotlin/serialization/AbstractVersionRequirementTest.kt b/compiler/tests/org/jetbrains/kotlin/serialization/AbstractVersionRequirementTest.kt
index c6ff006d40f..88bf4478f11 100644
--- a/compiler/tests/org/jetbrains/kotlin/serialization/AbstractVersionRequirementTest.kt
+++ b/compiler/tests/org/jetbrains/kotlin/serialization/AbstractVersionRequirementTest.kt
@@ -171,4 +171,21 @@ abstract class AbstractVersionRequirementTest : TestCaseWithTmpdir() {
             )
         )
     }
+
+    fun testInlineClassesAndRelevantDeclarations() {
+        doTest(
+            VersionRequirement.Version(1, 3), DeprecationLevel.ERROR, null, ProtoBuf.VersionRequirement.VersionKind.LANGUAGE_VERSION, null,
+            customLanguageVersion = LanguageVersion.KOTLIN_1_2,
+            fqNames = listOf(
+                "test.IC",
+                "test.Ctor.<init>",
+                "test.simpleFun",
+                "test.aliasedFun",
+                "test.simpleProp",
+                "test.result",
+                "test.Foo",
+                "test.Bar"
+            )
+        )
+    }
 }