diff --git a/idea/src/org/jetbrains/kotlin/idea/util/IterableTypesDetector.kt b/idea/src/org/jetbrains/kotlin/idea/util/IterableTypesDetector.kt
index 31bb2be9f6f..454b13dd686 100644
--- a/idea/src/org/jetbrains/kotlin/idea/util/IterableTypesDetector.kt
+++ b/idea/src/org/jetbrains/kotlin/idea/util/IterableTypesDetector.kt
@@ -42,7 +42,7 @@ public class IterableTypesDetector(
     private val cache = HashMap<JetType, Boolean>()
     private val iteratorName = Name.identifier("iterator")
 
-    private val typesWithIteratorExtensions: Collection<JetType> = scope.getFunctions(iteratorName)
+    private val typesWithExtensionIterator: Collection<JetType> = scope.getFunctions(iteratorName)
             .map { it.getExtensionReceiverParameter() }
             .filterNotNull()
             .map { it.getType() }
@@ -64,6 +64,6 @@ public class IterableTypesDetector(
     }
 
     private fun canBeIterable(type: JetType): Boolean {
-        return type.getMemberScope().getFunctions(iteratorName).isEmpty() || typesWithIteratorExtensions.any { type.isSubtypeOf(type) }
+        return type.getMemberScope().getFunctions(iteratorName).isEmpty() || typesWithExtensionIterator.any { type.isSubtypeOf(type) }
     }
 }
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