diff --git a/inventory/group_vars/horizon_all.yml b/inventory/group_vars/horizon_all.yml
index 5eda3dc0eb..4f591d204a 100644
--- a/inventory/group_vars/horizon_all.yml
+++ b/inventory/group_vars/horizon_all.yml
@@ -16,6 +16,7 @@
 horizon_external_ssl: "{{ openstack_external_ssl }}"
 horizon_service_region: "{{ service_region }}"
 horizon_enable_cinder_backup: "{{ hostvars['localhost']['cinder_service_backup_program_enabled'] }}"
+horizon_enable_heat_ui: "{{ (groups['heat_all'] is defined) and (groups['heat_all'] | length > 0) }}"
 horizon_enable_ironic_ui: "{{ (groups['ironic_all'] is defined) and (groups['ironic_all'] | length > 0) }}"
 horizon_enable_magnum_ui: "{{ (groups['magnum_all'] is defined) and (groups['magnum_all'] | length > 0) }}"
 horizon_enable_designate_ui: "{{ (groups['designate_all'] is defined) and (groups['designate_all'] | length > 0) }}"