--- a/mercurial/hgweb/webcommands.py	Wed Nov 30 19:23:04 2016 +0000
+++ b/mercurial/hgweb/webcommands.py	Sat Oct 22 14:35:10 2016 +0900
@@ -1302,7 +1302,7 @@
         return tmpl('helptopics', topics=topics, title=topicname,
                     subindex=True)
 
-    u = webutil.wsgiui()
+    u = webutil.wsgiui.load()
     u.verbose = True
 
     # Render a page from a sub-topic.