diff --git a/nova/flags.py b/nova/flags.py
index 396276ea..985f9ba0 100644
--- a/nova/flags.py
+++ b/nova/flags.py
@@ -74,10 +74,9 @@ DEFINE_string('default_instance_type',
                     'default instance type to use, testing only')
 
 DEFINE_string('vpn_image_id', 'ami-CLOUDPIPE', 'AMI for cloudpipe vpn server')
-
-flags.DEFINE_string('vpn_key_suffix',
-                    '-key',
-                    'Suffix to add to project name for vpn key')
+DEFINE_string('vpn_key_suffix',
+              '-key',
+              'Suffix to add to project name for vpn key')
 
 # UNUSED
 DEFINE_string('node_availability_zone',