diff --git a/mozilla/docshell/base/nsDocShell.cpp b/mozilla/docshell/base/nsDocShell.cpp
index d7f79649ed4..4d349bff4dd 100644
--- a/mozilla/docshell/base/nsDocShell.cpp
+++ b/mozilla/docshell/base/nsDocShell.cpp
@@ -5176,7 +5176,7 @@ nsDocShell::InternalLoad(nsIURI * aURI,
                          !name.Equals(NS_LITERAL_STRING("_main"))) {
                     nsCOMPtr<nsIDocShellTreeItem> targetTreeItem;
                     FindItemWithName(name.get(),
-                                     NS_STATIC_CAST(nsIInterfaceRequestor *, this),
+                                     nsnull,
                                      getter_AddRefs(targetTreeItem));
                     if (targetTreeItem)
                         targetDocShell = do_QueryInterface(targetTreeItem);