diff --git a/platform/analysis-impl/src/com/intellij/codeInspection/reference/RefManagerImpl.java b/platform/analysis-impl/src/com/intellij/codeInspection/reference/RefManagerImpl.java
index 0e01f71d154b..b3355f8fb448 100644
--- a/platform/analysis-impl/src/com/intellij/codeInspection/reference/RefManagerImpl.java
+++ b/platform/analysis-impl/src/com/intellij/codeInspection/reference/RefManagerImpl.java
@@ -500,14 +500,17 @@ public class RefManagerImpl extends RefManager {
         }
 
         for (PsiClass aClass : ((PsiClassOwner)containingFile).getClasses()) {
-          PsiClass superClass = aClass.getSuperClass();
-          if (superClass != null) {
-            RefElement superClassReference = getReference(superClass);
-            if (superClassReference != null) {
-              //in case of implicit inheritance, e.g. GroovyObject
-              //= no explicit reference is provided, dependency on groovy library could be treated as redundant though it is not
-              //inReference is not important in this case
-              ((RefElementImpl)refFile).addOutReference(superClassReference);
+          PsiClassType[] superTypes = aClass.getSuperTypes();
+          for (PsiClassType type : superTypes) {
+            PsiClass superClass = type.resolve();
+            if (superClass != null) {
+              RefElement superClassReference = getReference(superClass);
+              if (superClassReference != null) {
+                //in case of implicit inheritance, e.g. GroovyObject
+                //= no explicit reference is provided, dependency on groovy library could be treated as redundant though it is not
+                //inReference is not important in this case
+                ((RefElementImpl)refFile).addOutReference(superClassReference);
+              }
             }
           }
         }