diff -r 417f3c27983b -r ea68947ad0ce mercurial/httprepo.py
--- a/mercurial/httprepo.py	Mon Nov 15 17:04:55 2010 -0600
+++ b/mercurial/httprepo.py	Tue Nov 16 21:35:58 2010 +0100
@@ -68,7 +68,7 @@
         raise util.Abort(_('operation not supported over http'))
 
     def _callstream(self, cmd, **args):
-        if cmd is 'pushkey':
+        if cmd == 'pushkey':
             args['data'] = ''
         data = args.pop('data', None)
         headers = args.pop('headers', {})