diff --git a/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/InnerClassesLowering.kt b/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/InnerClassesLowering.kt
index f817dbf3386..c6449bb82dc 100644
--- a/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/InnerClassesLowering.kt
+++ b/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/InnerClassesLowering.kt
@@ -183,7 +183,7 @@ class InnerClassesLowering(val context: BackendContext) : ClassLoweringPass {
             if (descriptor1 is ReceiverParameterDescriptor) {
                 val receiverValue = descriptor1.value
                 if (receiverValue is ImplicitClassReceiver) {
-                    return class2Symbol[receiverValue.classDescriptor]!!
+                    return class2Symbol[receiverValue.classDescriptor]
                 }
             }
             return null