diff --git a/keystone/client/service/nova21.yml b/keystone/client/service/nova21.yml
index 2782ec2..33ebda5 100644
--- a/keystone/client/service/nova21.yml
+++ b/keystone/client/service/nova21.yml
@@ -1,3 +1,5 @@
+classes:
+- system.keystone.client.v3.service.nova21
 parameters:
   _param:
     cluster_public_protocol: https