diff --git a/idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/CompletionSession.kt b/idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/CompletionSession.kt
index 6090925a152..d73caab4dac 100644
--- a/idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/CompletionSession.kt
+++ b/idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/CompletionSession.kt
@@ -450,7 +450,7 @@ abstract class CompletionSession(
                 predictableSmartCastsOnly = true /* we don't include smart cast receiver types for "unpredictable" receiver value to mark members grayed */)
 
         if (callTypeAndReceiver is CallTypeAndReceiver.SAFE || isDebuggerContext) {
-            receiverTypes = receiverTypes!!.map { it.makeNotNullable() }
+            receiverTypes = receiverTypes?.map { it.makeNotNullable() }
         }
 
         return callTypeAndReceiver to receiverTypes