diff --git a/idea/ide-common/src/org/jetbrains/kotlin/idea/util/extensionsUtils.kt b/idea/ide-common/src/org/jetbrains/kotlin/idea/util/extensionsUtils.kt
index f13aa9ef325..c68bda19946 100644
--- a/idea/ide-common/src/org/jetbrains/kotlin/idea/util/extensionsUtils.kt
+++ b/idea/ide-common/src/org/jetbrains/kotlin/idea/util/extensionsUtils.kt
@@ -66,7 +66,7 @@ fun <TCallable : CallableDescriptor> TCallable.substituteExtensionIfCallable(
         dataFlowInfo: DataFlowInfo,
         containingDeclarationOrModule: DeclarationDescriptor
 ): Collection<TCallable> {
-    var types = SmartCastManager().getSmartCastVariants(receiver, bindingContext, containingDeclarationOrModule, dataFlowInfo)
+    val types = SmartCastManager().getSmartCastVariants(receiver, bindingContext, containingDeclarationOrModule, dataFlowInfo)
     return substituteExtensionIfCallable(types, callType)
 }