diff --git a/mercurial/hgweb/protocol.py b/mercurial/hgweb/protocol.py
--- a/mercurial/hgweb/protocol.py
+++ b/mercurial/hgweb/protocol.py
@@ -8,7 +8,6 @@
 from __future__ import absolute_import
 
 import cgi
-import zlib
 
 from .common import (
     HTTP_OK,