diff --git a/plugins/kotlin-serialization/kotlin-serialization-compiler/src/org/jetbrains/kotlinx/serialization/compiler/backend/ir/SerializableIrGenerator.kt b/plugins/kotlin-serialization/kotlin-serialization-compiler/src/org/jetbrains/kotlinx/serialization/compiler/backend/ir/SerializableIrGenerator.kt
index b70d443634f..5194427581c 100644
--- a/plugins/kotlin-serialization/kotlin-serialization-compiler/src/org/jetbrains/kotlinx/serialization/compiler/backend/ir/SerializableIrGenerator.kt
+++ b/plugins/kotlin-serialization/kotlin-serialization-compiler/src/org/jetbrains/kotlinx/serialization/compiler/backend/ir/SerializableIrGenerator.kt
@@ -7,17 +7,15 @@ import org.jetbrains.kotlin.codegen.CompilationException
 import org.jetbrains.kotlin.descriptors.ClassConstructorDescriptor
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
 import org.jetbrains.kotlin.descriptors.FunctionDescriptor
+import org.jetbrains.kotlin.ir.IrElement
 import org.jetbrains.kotlin.ir.builders.*
-import org.jetbrains.kotlin.ir.declarations.IrAnonymousInitializer
-import org.jetbrains.kotlin.ir.declarations.IrClass
-import org.jetbrains.kotlin.ir.declarations.IrProperty
-import org.jetbrains.kotlin.ir.declarations.IrValueParameter
+import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.expressions.IrExpression
 import org.jetbrains.kotlin.ir.expressions.IrStatementOrigin
 import org.jetbrains.kotlin.ir.expressions.impl.IrGetValueImpl
 import org.jetbrains.kotlin.ir.expressions.impl.IrDelegatingConstructorCallImpl
-import org.jetbrains.kotlin.ir.util.SymbolTable
-import org.jetbrains.kotlin.ir.util.TypeTranslator
+import org.jetbrains.kotlin.ir.util.*
+import org.jetbrains.kotlin.ir.visitors.acceptVoid
 import org.jetbrains.kotlin.js.resolve.diagnostics.findPsi
 import org.jetbrains.kotlin.resolve.BindingContext
 import org.jetbrains.kotlin.resolve.descriptorUtil.getSuperClassOrAny
@@ -103,10 +101,22 @@ class SerializableIrGenerator(
             irClass.declarations.asSequence()
                 .filterIsInstance<IrAnonymousInitializer>()
                 .forEach { initializer ->
-                    initializer.body.statements.forEach { +it }
+                    initializer.body.statements.forEach { +it.deepCopyWithSymbols(initialParent = ctor) }
                 }
         }
 
+    // todo: this is copypaste from DeepCopyIrWithSymbols.kt,
+    //   remove after KT-18563 is fixed and bootstrap updated.
+    private inline fun <reified T : IrElement> T.deepCopyWithSymbols(
+        initialParent: IrDeclarationParent? = null,
+        descriptorRemapper: DescriptorsRemapper = DescriptorsRemapper.Default
+    ): T {
+        val symbolRemapper = DeepCopySymbolRemapper(descriptorRemapper)
+        acceptVoid(symbolRemapper)
+        val typeRemapper = DeepCopyTypeRemapper(symbolRemapper)
+        return transform(DeepCopyIrTreeWithSymbols(symbolRemapper, typeRemapper), null).patchDeclarationParents(initialParent) as T
+    }
+
     private fun IrBlockBodyBuilder.generateSuperNonSerializableCall(superClass: ClassDescriptor) {
         val suitableCtor = superClass.constructors.singleOrNull { it.valueParameters.size == 0 }
             ?: throw IllegalArgumentException("Non-serializable parent of serializable $serializableDescriptor must have no arg constructor")