diff --git a/ansible/roles/kolla-ansible/vars/main.yml b/ansible/roles/kolla-ansible/vars/main.yml
index cd3767c30..9c590f4bc 100644
--- a/ansible/roles/kolla-ansible/vars/main.yml
+++ b/ansible/roles/kolla-ansible/vars/main.yml
@@ -201,6 +201,7 @@ kolla_feature_flags:
   - openvswitch
   - osprofiler
   - ovn
+  - ovn_sb_db_relay
   - ovs_dpdk
   - placement
   - prometheus