diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/DeepCopyIrTreeWithSymbols.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/DeepCopyIrTreeWithSymbols.kt
index 7c47194250b..13112ddf6f2 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/DeepCopyIrTreeWithSymbols.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/DeepCopyIrTreeWithSymbols.kt
@@ -163,6 +163,7 @@ open class DeepCopyIrTreeWithSymbols(
             isExpect = declaration.isExpect,
             isFun = declaration.isFun,
             hasEnumEntries = declaration.hasEnumEntries,
+            source = declaration.source,
         ).apply {
             transformAnnotations(declaration)
             copyTypeParametersFrom(declaration)