diff --git a/ansible/roles/heat/tasks/bootstrap_service.yml b/ansible/roles/heat/tasks/bootstrap_service.yml
index d2ee80f67b..324031ef52 100644
--- a/ansible/roles/heat/tasks/bootstrap_service.yml
+++ b/ansible/roles/heat/tasks/bootstrap_service.yml
@@ -12,6 +12,7 @@
       KOLLA_CONFIG_STRATEGY: "{{ config_strategy }}"
       OS_AUTH_URL: "{{ openstack_auth.auth_url }}"
       OS_IDENTITY_API_VERSION: "3"
+      OS_INTERFACE: "internal"
       OS_USERNAME: "{{ openstack_auth.username }}"
       OS_PASSWORD: "{{ openstack_auth.password }}"
       OS_PROJECT_NAME: "{{ openstack_auth.project_name }}"