diff --git a/elements/puppet-stack-config/puppet-stack-config.pp b/elements/puppet-stack-config/puppet-stack-config.pp
index 726612d93..62ee47be4 100644
--- a/elements/puppet-stack-config/puppet-stack-config.pp
+++ b/elements/puppet-stack-config/puppet-stack-config.pp
@@ -373,7 +373,8 @@ include ::glance::backend::swift
 include ::glance::notify::rabbitmq
 
 class { '::nova':
-  debug              => hiera('debug'),
+  debug               => hiera('debug'),
+  notification_format => 'unversioned',
 }
 
 class { '::nova::api':