diff --git a/embedding/components/windowwatcher/src/nsWindowWatcher.cpp b/embedding/components/windowwatcher/src/nsWindowWatcher.cpp
index aa4c12eea2d6..3f95fa5ebf32 100644
--- a/embedding/components/windowwatcher/src/nsWindowWatcher.cpp
+++ b/embedding/components/windowwatcher/src/nsWindowWatcher.cpp
@@ -2123,11 +2123,3 @@ nsWindowWatcher::GetJSContextFromWindow(nsIDOMWindow *aWindow)
 
   return cx;
 }
-
-JSObject *
-nsWindowWatcher::GetWindowScriptObject(nsIDOMWindow *inWindow)
-{
-  nsCOMPtr<nsIScriptGlobalObject> scriptGlobal(do_QueryInterface(inWindow));
-  return scriptGlobal ? scriptGlobal->GetGlobalJSObject() : 0;
-}
-
diff --git a/embedding/components/windowwatcher/src/nsWindowWatcher.h b/embedding/components/windowwatcher/src/nsWindowWatcher.h
index 4ec94358221a..bef0491c414b 100644
--- a/embedding/components/windowwatcher/src/nsWindowWatcher.h
+++ b/embedding/components/windowwatcher/src/nsWindowWatcher.h
@@ -119,7 +119,6 @@ private:
                                       nsIDocShellTreeItem **outTreeItem);
   static void       GetWindowTreeOwner(nsIDOMWindow *inWindow,
                                        nsIDocShellTreeOwner **outTreeOwner);
-  static JSObject  *GetWindowScriptObject(nsIDOMWindow *inWindow);
 
   nsVoidArray           mEnumeratorList;
   nsWatcherWindowEntry *mOldestWindow;