diff --git a/ironic/api/single.yml b/ironic/api/single.yml
index e0cbf8c..0109973 100644
--- a/ironic/api/single.yml
+++ b/ironic/api/single.yml
@@ -15,6 +15,7 @@
       bind:
         address: ${_param:single_address}
       database:
+        user: ${_param:mysql_ironic_username}
         x509:
           enabled: ${_param:openstack_mysql_x509_enabled}
           ca_file: ${_param:mysql_ironic_ssl_ca_file}