diff --git a/core/descriptors/src/org/jetbrains/jet/lang/types/lang/KotlinBuiltIns.java b/core/descriptors/src/org/jetbrains/jet/lang/types/lang/KotlinBuiltIns.java
index 2cf84b7efb5..5f37b6fe00e 100644
--- a/core/descriptors/src/org/jetbrains/jet/lang/types/lang/KotlinBuiltIns.java
+++ b/core/descriptors/src/org/jetbrains/jet/lang/types/lang/KotlinBuiltIns.java
@@ -850,6 +850,10 @@ public class KotlinBuiltIns {
         return false;
     }
 
+    public boolean isExactFunctionOrExtensionFunctionType(@NotNull JetType type) {
+        return setContainsClassOf(extensionFunctionClassesSet, type) || setContainsClassOf(functionClassesSet, type);
+    }
+
     public boolean isExtensionFunctionType(@NotNull JetType type) {
         if (setContainsClassOf(extensionFunctionClassesSet, type)) return true;