diff --git a/compiler/fir/fir-serialization/src/org/jetbrains/kotlin/fir/serialization/serializationUtil.kt b/compiler/fir/fir-serialization/src/org/jetbrains/kotlin/fir/serialization/serializationUtil.kt
index 804f88dab51..f88099dd321 100644
--- a/compiler/fir/fir-serialization/src/org/jetbrains/kotlin/fir/serialization/serializationUtil.kt
+++ b/compiler/fir/fir-serialization/src/org/jetbrains/kotlin/fir/serialization/serializationUtil.kt
@@ -41,7 +41,7 @@ fun ConeKotlinType.suspendFunctionTypeToFunctionTypeWithContinuation(session: Fi
         typeArguments = (typeArguments.dropLast(1) + continuationClassId.toLookupTag().constructClassType(
             arrayOf(lastTypeArgument),
             isNullable = false
-        ) + lastTypeArgument).toTypedArray(),
+        ) + session.builtinTypes.nullableAnyType.type).toTypedArray(),
         isNullable = fullyExpandedType.isNullable,
         attributes = fullyExpandedType.attributes
     )
@@ -49,4 +49,4 @@ fun ConeKotlinType.suspendFunctionTypeToFunctionTypeWithContinuation(session: Fi
 
 fun FirMemberDeclaration.shouldBeSerialized(actualizedExpectDeclaration: Set<FirDeclaration>?): Boolean {
     return !isExpect || actualizedExpectDeclaration == null || this !in actualizedExpectDeclaration
-}
\ No newline at end of file
+}