diff --git a/mozilla/extensions/xmlextras/base/src/nsXMLHttpRequest.cpp b/mozilla/extensions/xmlextras/base/src/nsXMLHttpRequest.cpp
index 23c53db25d3..77f5dd2fabe 100644
--- a/mozilla/extensions/xmlextras/base/src/nsXMLHttpRequest.cpp
+++ b/mozilla/extensions/xmlextras/base/src/nsXMLHttpRequest.cpp
@@ -246,9 +246,9 @@ GetDocumentFromScriptContext(nsIScriptContext *aScriptContext)
   if (window) {
     nsCOMPtr<nsIDOMDocument> domdoc;
     window->GetDocument(getter_AddRefs(domdoc));
-    //if (domdoc) {
+    if (domdoc) {
       CallQueryInterface(domdoc, &doc);
-    //}
+    }
   }
   return doc;
 }