diff --git a/java/refactoring.java/src/org/netbeans/modules/refactoring/java/RefactoringUtils.java b/java/refactoring.java/src/org/netbeans/modules/refactoring/java/RefactoringUtils.java
index ae5f7fd6f820..db0dadefb162 100644
--- a/java/refactoring.java/src/org/netbeans/modules/refactoring/java/RefactoringUtils.java
+++ b/java/refactoring.java/src/org/netbeans/modules/refactoring/java/RefactoringUtils.java
@@ -305,7 +305,7 @@ public static boolean isFileInOpenProject(FileObject file) {
     public static boolean isOnSourceClasspath(FileObject fo) {
         Project pr = FileOwnerQuery.getOwner(fo);
         if (pr == null) {
-            return false;
+            return SourceLauncher.isSourceLauncherFile(fo);
         }
 
         //workaround for 143542