diff --git a/ansible/roles/nova-cell/tasks/discover_computes.yml b/ansible/roles/nova-cell/tasks/discover_computes.yml
index 1f0122ad8f..7a65cbf908 100644
--- a/ansible/roles/nova-cell/tasks/discover_computes.yml
+++ b/ansible/roles/nova-cell/tasks/discover_computes.yml
@@ -31,7 +31,7 @@
     --os-auth-url {{ keystone_admin_url }}
     --os-identity-api-version 3
     --os-project-domain-name {{ openstack_auth.domain_name }}
-    --os-tenant-name {{ openstack_auth.project_name }}
+    --os-project-name {{ openstack_auth.project_name }}
     --os-username {{ openstack_auth.username }}
     --os-password {{ keystone_admin_password }}
     --os-user-domain-name {{ openstack_auth.domain_name }}