diff --git a/mozilla/docshell/base/nsDocShell.cpp b/mozilla/docshell/base/nsDocShell.cpp
index fdc6bf21962..647e666dd50 100644
--- a/mozilla/docshell/base/nsDocShell.cpp
+++ b/mozilla/docshell/base/nsDocShell.cpp
@@ -2757,7 +2757,8 @@ nsDocShell::SetTitle(const PRUnichar * aTitle)
         mCurrentURI->GetSpec(getter_Copies(url));
         nsCOMPtr<nsIBrowserHistory> browserHistory =
             do_QueryInterface(mGlobalHistory);
-        browserHistory->SetPageTitle(url, aTitle);
+        if (browserHistory)
+            browserHistory->SetPageTitle(url, aTitle);
     }