diff --git a/mozilla/webshell/public/nsIWebShell.h b/mozilla/webshell/public/nsIWebShell.h
index cab0f10414c..f9a54f4f807 100644
--- a/mozilla/webshell/public/nsIWebShell.h
+++ b/mozilla/webshell/public/nsIWebShell.h
@@ -27,6 +27,7 @@
 class nsIFactory;
 class nsIPostData;
 class nsIStreamObserver;
+class nsIDocumentLoader;
 class nsIWebShell;
 class nsIWebShellContainer;
 
@@ -104,6 +105,8 @@ public:
   NS_IMETHOD SetObserver(nsIStreamObserver* anObserver) = 0;
   NS_IMETHOD GetObserver(nsIStreamObserver*& aResult) = 0;
 
+  NS_IMETHOD GetDocumentLoader(nsIDocumentLoader*& aResult) = 0;
+
   NS_IMETHOD GetRootWebShell(nsIWebShell*& aResult) = 0;
   NS_IMETHOD SetParent(nsIWebShell* aParent) = 0;
   NS_IMETHOD GetParent(nsIWebShell*& aParent) = 0;