--- a/mercurial/hgweb/server.py	Tue Oct 11 20:21:13 2011 -0500
+++ b/mercurial/hgweb/server.py	Tue Oct 11 23:16:05 2011 -0500
@@ -246,6 +246,7 @@
 
 try:
     from threading import activeCount
+    activeCount() # silence pyflakes
     _mixin = SocketServer.ThreadingMixIn
 except ImportError:
     if util.safehasattr(os, "fork"):