diff --git a/platform/lang-api/src/com/intellij/psi/search/ProjectScope.java b/platform/lang-api/src/com/intellij/psi/search/ProjectScope.java
index 83cc6be033de..56d750efce0a 100644
--- a/platform/lang-api/src/com/intellij/psi/search/ProjectScope.java
+++ b/platform/lang-api/src/com/intellij/psi/search/ProjectScope.java
@@ -63,9 +63,11 @@ public class ProjectScope {
           private final ProjectFileIndex myFileIndex = projectRootManager.getFileIndex();
 
           public boolean contains(VirtualFile file) {
-            if (myFileIndex.isInLibraryClasses(file)) return false;
+            if (file instanceof VirtualFileWindow) return true;
 
-            return file instanceof VirtualFileWindow || myFileIndex.isInContent(file);
+            if (myFileIndex.isInLibraryClasses(file) && !myFileIndex.isInSourceContent(file)) return false;
+
+            return myFileIndex.isInContent(file);
           }
 
           public int compare(VirtualFile file1, VirtualFile file2) {
@@ -107,4 +109,4 @@ public class ProjectScope {
     }
     return projectScope;
   }
-}
\ No newline at end of file
+}
diff --git a/platform/lang-impl/src/com/intellij/openapi/module/impl/scopes/ModuleWithDependentsScope.java b/platform/lang-impl/src/com/intellij/openapi/module/impl/scopes/ModuleWithDependentsScope.java
index 042e67a688fd..4523bb6f9e8a 100644
--- a/platform/lang-impl/src/com/intellij/openapi/module/impl/scopes/ModuleWithDependentsScope.java
+++ b/platform/lang-impl/src/com/intellij/openapi/module/impl/scopes/ModuleWithDependentsScope.java
@@ -80,7 +80,7 @@ public class ModuleWithDependentsScope extends GlobalSearchScope {
     if (moduleOfFile == null) return false;
     if (!myModules.contains(moduleOfFile)) return false;
     if (myOnlyTests && !myProjectFileIndex.isInTestSourceContent(file)) return false;
-    if (myProjectFileIndex.isInLibraryClasses(file)) return false;
+    if (myProjectFileIndex.isInLibraryClasses(file) && !myProjectFileIndex.isInSourceContent(file)) return false;
     return true;
   }