diff --git a/mozilla/extensions/xmlextras/build/src/nsXMLExtrasModule.cpp b/mozilla/extensions/xmlextras/build/src/nsXMLExtrasModule.cpp
index 0c90f72f036..584f3b7f007 100644
--- a/mozilla/extensions/xmlextras/build/src/nsXMLExtrasModule.cpp
+++ b/mozilla/extensions/xmlextras/build/src/nsXMLExtrasModule.cpp
@@ -89,6 +89,7 @@ NS_DOMCI_EXTENSION(XMLExtras)
         NS_DOMCI_EXTENSION_ENTRY_INTERFACE(nsIXMLHttpRequest)
         NS_DOMCI_EXTENSION_ENTRY_INTERFACE(nsIJSXMLHttpRequest)
         NS_DOMCI_EXTENSION_ENTRY_INTERFACE(nsIDOMEventTarget)
+        NS_DOMCI_EXTENSION_ENTRY_INTERFACE(nsIInterfaceRequestor)
     NS_DOMCI_EXTENSION_ENTRY_END_NO_PRIMARY_IF(XMLHttpRequest, PR_TRUE, &kXMLHttpRequestCID)
 
     NS_DOMCI_EXTENSION_ENTRY_BEGIN(XMLHttpProgressEvent)