diff --git a/heat/templates/configmap-etc.yaml b/heat/templates/configmap-etc.yaml
index f735956e4a..dd99eb1461 100644
--- a/heat/templates/configmap-etc.yaml
+++ b/heat/templates/configmap-etc.yaml
@@ -68,7 +68,7 @@ limitations under the License.
 {{- end -}}
 
 {{- if empty .Values.conf.heat.DEFAULT.stack_user_domain_name -}}
-{{- set .Values.conf.heat.DEFAULT "stack_user_domain_name" .Values.endpoints.identity.auth.stack_user.region_name | quote | trunc 0 -}}
+{{- set .Values.conf.heat.DEFAULT "stack_user_domain_name" .Values.endpoints.identity.auth.stack_user.domain_name | quote | trunc 0 -}}
 {{- end -}}
 {{- if empty .Values.conf.heat.DEFAULT.stack_domain_admin -}}
 {{- set .Values.conf.heat.DEFAULT "stack_domain_admin" .Values.endpoints.identity.auth.stack_user.username | quote | trunc 0 -}}