diff --git a/mozilla/xulrunner/config/mozconfig b/mozilla/xulrunner/config/mozconfig
index 33a9470da05..828398cccc8 100644
--- a/mozilla/xulrunner/config/mozconfig
+++ b/mozilla/xulrunner/config/mozconfig
@@ -6,5 +6,5 @@
 mk_add_options MOZ_CO_PROJECT=xulrunner
 ac_add_options --enable-application=xulrunner
 
-ac_add_options --enable-extensions=xml-rpc,xmlextras,pref,transformiix,universalchardet,webservices,gnomevfs,negotiateauth
+ac_add_options --enable-extensions=xml-rpc,xmlextras,pref,transformiix,universalchardet,webservices,gnomevfs,auth
 ac_add_options --enable-crypto