diff --git a/dom/base/nsGlobalWindow.cpp b/dom/base/nsGlobalWindow.cpp
index 592b3e61f27..f1be6e7f1d2 100644
--- a/dom/base/nsGlobalWindow.cpp
+++ b/dom/base/nsGlobalWindow.cpp
@@ -8293,6 +8293,14 @@ nsGlobalWindow::GetInterface(const nsIID & aIID, void **aSink)
       }
     }
   }
+  else if (aIID.Equals(NS_GET_IID(nsIDocShell))) {
+    FORWARD_TO_OUTER(GetInterface, (aIID, aSink), NS_ERROR_NOT_INITIALIZED);
+
+    nsCOMPtr<nsIDocShell> docShell = do_QueryInterface(mDocShell);
+    if (docShell) {
+      docShell.forget(aSink);
+    }
+  }
 #ifdef NS_PRINTING
   else if (aIID.Equals(NS_GET_IID(nsIWebBrowserPrint))) {
     FORWARD_TO_OUTER(GetInterface, (aIID, aSink), NS_ERROR_NOT_INITIALIZED);