diff --git a/ansible/roles/nova/tasks/discover_computes.yml b/ansible/roles/nova/tasks/discover_computes.yml
index 3035020fbc..e53822df21 100644
--- a/ansible/roles/nova/tasks/discover_computes.yml
+++ b/ansible/roles/nova/tasks/discover_computes.yml
@@ -10,6 +10,7 @@
     --os-username {{ openstack_auth.username }}
     --os-password {{ keystone_admin_password }}
     --os-user-domain-name {{ openstack_auth.domain_name }}
+    --os-region-name {{ openstack_region_name }}
     compute service list -f json --service nova-compute
   register: nova_compute_services
   changed_when: false