diff --git a/mozilla/xpfe/xpviewer/src/nsSetupRegistry.cpp b/mozilla/xpfe/xpviewer/src/nsSetupRegistry.cpp
index 1d4fadfeca5..545c6b97056 100644
--- a/mozilla/xpfe/xpviewer/src/nsSetupRegistry.cpp
+++ b/mozilla/xpfe/xpviewer/src/nsSetupRegistry.cpp
@@ -119,6 +119,7 @@ static NS_DEFINE_IID(kLookAndFeelCID, NS_LOOKANDFEEL_CID);
 static NS_DEFINE_IID(kCDOMScriptObjectFactory, NS_DOM_SCRIPT_OBJECT_FACTORY_CID);
 static NS_DEFINE_IID(kCDOMNativeObjectRegistry, NS_DOM_NATIVE_OBJECT_REGISTRY_CID);
 static NS_DEFINE_IID(kCHTMLDocument, NS_HTMLDOCUMENT_CID);
+static NS_DEFINE_IID(kCXMLDocument, NS_XMLDOCUMENT_CID);
 static NS_DEFINE_IID(kCImageDocument, NS_IMAGEDOCUMENT_CID);
 static NS_DEFINE_IID(kCHTMLImageElementFactory, NS_HTMLIMAGEELEMENTFACTORY_CID);
 static NS_DEFINE_IID(kNetServiceCID, NS_NETSERVICE_CID);
@@ -173,6 +174,7 @@ NS_SetupRegistry()
   nsRepository::RegisterFactory(kCDOMScriptObjectFactory, DOM_DLL, PR_FALSE, PR_FALSE);
   nsRepository::RegisterFactory(kCDOMNativeObjectRegistry, DOM_DLL, PR_FALSE, PR_FALSE);
   nsRepository::RegisterFactory(kCHTMLDocument, LAYOUT_DLL, PR_FALSE, PR_FALSE);
+  nsRepository::RegisterFactory(kCXMLDocument, LAYOUT_DLL, PR_FALSE, PR_FALSE);
   nsRepository::RegisterFactory(kCImageDocument, LAYOUT_DLL, PR_FALSE, PR_FALSE);
   nsRepository::RegisterFactory(kCHTMLImageElementFactory, LAYOUT_DLL, PR_FALSE, PR_FALSE);
   nsRepository::RegisterFactory(kNetServiceCID, NETLIB_DLL, PR_FALSE, PR_FALSE);