diff --git a/panko/server/cluster.yml b/panko/server/cluster.yml
index 9715456..7954944 100644
--- a/panko/server/cluster.yml
+++ b/panko/server/cluster.yml
@@ -26,6 +26,7 @@
       event_time_to_live: ${_param:panko_event_time_to_live}
       identity:
         host: ${_param:openstack_control_address}
+        protocol: ${_param:cluster_internal_protocol}
       database:
         host: ${_param:openstack_database_address}
         x509: