diff --git a/mozilla/xpinstall/packager/windows/browser.jst b/mozilla/xpinstall/packager/windows/browser.jst
index da75317f02c..6a920096f3b 100644
--- a/mozilla/xpinstall/packager/windows/browser.jst
+++ b/mozilla/xpinstall/packager/windows/browser.jst
@@ -383,8 +383,8 @@ function upgradeCleanup()
   deleteThisFile("Program",    "gkwidget.dll");
   deleteThisFile("Program",    "jpeg3250.dll");
   deleteThisFile("Program",    "mozreg.dll");
-  deleteThisFile("Program",    "ISimpleDOMNode.dll");
-  deleteThisFile("Program",    "ISimpleDOMDocument.dll");
+  deleteThisFile("Program",    "ISimpleDOMNodeMarshal.dll");
+  deleteThisFile("Program",    "ISimpleDOMDocumentMarshal.dll");
   deleteThisFile("Program",    "defaults/pref/config.js");
   deleteThisFile("Program",    "defaults/pref/initpref.js");
   deleteThisFile("Program",    "defaults/pref/psm-glue.js");