diff --git a/metadata/service/server/single.yml b/metadata/service/server/single.yml
index 68fc4c1..8979b0c 100644
--- a/metadata/service/server/single.yml
+++ b/metadata/service/server/single.yml
@@ -26,6 +26,7 @@
       identity:
         engine: keystone
         host: ${_param:single_address}
+        region: RegionOne
         port: 35357
         tenant: service
         user: aodh