diff --git a/edbob/pyramid/views/crud.py b/edbob/pyramid/views/crud.py
index b51b96e..3be0b60 100644
--- a/edbob/pyramid/views/crud.py
+++ b/edbob/pyramid/views/crud.py
@@ -133,7 +133,7 @@ class Crud(object):
         if not template_prefix:
             template_prefix = url_prefix
         if not permission_prefix:
-            permission_prefix = route_prefix
+            permission_prefix = route_prefix + 's'
 
         config.add_route('%s.new' % route_prefix, '%s/new' % url_prefix)
         config.add_view(cls, attr='new', route_name='%s.new' % route_prefix, renderer='%s/crud.mako' % template_prefix,