--- a/mercurial/wireproto.py	Thu May 29 14:59:22 2014 -0700
+++ b/mercurial/wireproto.py	Tue May 27 15:43:09 2014 -0700
@@ -202,7 +202,8 @@
 # :plain: string with no transformation needed.
 gboptsmap = {'heads':  'nodes',
              'common': 'nodes',
-             'bundlecaps': 'csv'}
+             'bundlecaps': 'csv',
+             'listkeys': 'csv'}
 
 # client side