diff --git a/designate/server/cluster/simple.yml b/designate/server/cluster/simple.yml
index ecf34c1..55998d5 100644
--- a/designate/server/cluster/simple.yml
+++ b/designate/server/cluster/simple.yml
@@ -33,7 +33,7 @@
         name:
           main_database: designate
           pool_manager: designate_pool_manager
-        user: designate
+        user: ${_param:mysql_designate_username}
         password: ${_param:mysql_designate_password}
         x509:
           enabled: ${_param:openstack_mysql_x509_enabled}
@@ -47,7 +47,7 @@
         host: ${_param:openstack_control_address}
         port: 35357
         tenant: service
-        user: designate
+        user: ${_param:keystone_designate_username}
         password: ${_param:keystone_designate_password}
         protocol: ${_param:cluster_internal_protocol}
       bind: