diff --git a/mercurial/hgweb/request.py b/mercurial/hgweb/request.py
--- a/mercurial/hgweb/request.py
+++ b/mercurial/hgweb/request.py
@@ -6,7 +6,7 @@
 # This software may be used and distributed according to the terms
 # of the GNU General Public License, incorporated herein by reference.
 
-import socket, sys, cgi, os, errno
+import socket, cgi, errno
 from mercurial.i18n import gettext as _
 
 class wsgiapplication(object):