diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/IncrementalCompilationSupport.kt b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/IncrementalCompilationSupport.kt
index 65f286ae02a..b10c31c6c11 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/IncrementalCompilationSupport.kt
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/IncrementalCompilationSupport.kt
@@ -127,6 +127,8 @@ class CurrentModuleWithICDeserializer(
         icDeserializer.init(delegate)
     }
 
+    override fun toString(): String = "Incremental Cache Klib"
+
     override val klib: IrLibrary
         get() = icDeserializer.klib
 
diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/KotlinIrLinker.kt b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/KotlinIrLinker.kt
index 62574d45b92..8ceda6f526c 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/KotlinIrLinker.kt
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/KotlinIrLinker.kt
@@ -103,6 +103,8 @@ abstract class KotlinIrLinker(
                     filesWithPendingTopLevels.remove(pendingDeserializer)
                 }
             }
+
+            override fun toString(): String = klib.toString()
         }
 
         private val moduleDeserializationState = ModuleDeserializationState()