diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/serialization/KonanIrlinker.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/serialization/KonanIrlinker.kt
index 527a29014f5..2a2a7753d91 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/serialization/KonanIrlinker.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/serialization/KonanIrlinker.kt
@@ -98,7 +98,7 @@ class KonanIrLinker(
         val fwdModule = forwardModuleDescriptor ?: error("Forward declaration module should not be null")
 
         return with(idSig as IdSignature.PublicSignature) {
-            val classId = ClassId(packageFqn, classFqn, false)
+            val classId = ClassId(packageFqn, declarationFqn, false)
             fwdModule.findClassAcrossModuleDependencies(classId)
         }
     }