--- a/web/views/massmailing.py	Mon Mar 11 18:37:01 2013 +0100
+++ b/web/views/massmailing.py	Fri Feb 22 19:36:40 2013 +0100
@@ -21,6 +21,7 @@
 _ = unicode
 
 import operator
+from functools import reduce
 
 from cubicweb.predicates import (is_instance, authenticated_user,
                                 adaptable, match_form_params)