diff --git a/js/src/xpconnect/loader/mozJSComponentLoader.h b/js/src/xpconnect/loader/mozJSComponentLoader.h
index e4a63514d1f..1da8a372d8a 100644
--- a/js/src/xpconnect/loader/mozJSComponentLoader.h
+++ b/js/src/xpconnect/loader/mozJSComponentLoader.h
@@ -156,6 +156,8 @@ class mozJSComponentLoader : public nsIModuleLoader,
         char                *location;
     };
 
+    friend class ModuleEntry;
+
     nsClassHashtable<nsHashableHashKey, ModuleEntry> mModules;
 
     PRBool mInitialized;