diff --git a/mozilla/embedding/components/windowwatcher/src/nsWindowWatcher.h b/mozilla/embedding/components/windowwatcher/src/nsWindowWatcher.h
index e370273a0dc..c58f0ccf6aa 100644
--- a/mozilla/embedding/components/windowwatcher/src/nsWindowWatcher.h
+++ b/mozilla/embedding/components/windowwatcher/src/nsWindowWatcher.h
@@ -128,6 +128,7 @@ private:
   static void       CalcSizeSpec(const char* aFeatures, SizeSpec& aResult);
   static nsresult   ReadyOpenedDocShellItem(nsIDocShellTreeItem *aOpenedItem,
                                             nsIDOMWindow *aParent,
+                                            PRBool aWindowIsNew,
                                             nsIDOMWindow **aOpenedWindow);
   static void       SizeOpenedDocShellItem(nsIDocShellTreeItem *aDocShellItem,
                                            nsIDOMWindow *aParent,