diff --git a/mercurial/hgweb/request.py b/mercurial/hgweb/request.py
--- a/mercurial/hgweb/request.py
+++ b/mercurial/hgweb/request.py
@@ -8,7 +8,6 @@
 
 from __future__ import absolute_import
 
-import wsgiref.headers as wsgiheaders
 #import wsgiref.validate
 
 from ..thirdparty import (
@@ -19,6 +18,9 @@
     pycompat,
     util,
 )
+from . import (
+    wsgiheaders,
+)
 
 class multidict(object):
     """A dict like object that can store multiple values for a key.