diff --git a/platform/core-api/src/com/intellij/psi/search/GlobalSearchScope.java b/platform/core-api/src/com/intellij/psi/search/GlobalSearchScope.java
index 5b8a60ef8120..f1740da0f6d9 100644
--- a/platform/core-api/src/com/intellij/psi/search/GlobalSearchScope.java
+++ b/platform/core-api/src/com/intellij/psi/search/GlobalSearchScope.java
@@ -366,7 +366,7 @@ public abstract class GlobalSearchScope extends SearchScope implements ProjectAw
     @NotNull
     @Override
     public GlobalSearchScope intersectWith(@NotNull GlobalSearchScope scope) {
-      if (myScope1.equals(scope) || myScope2.equals(scope)) {
+      if (myScope1.equals(scope) || myScope2.equals(scope) || equals(scope)) {
         return this;
       }
       return new IntersectionScope(this, scope, null);