diff --git a/ceilometer/agent/cluster.yml b/ceilometer/agent/cluster.yml
index a598ee5..769ff68 100644
--- a/ceilometer/agent/cluster.yml
+++ b/ceilometer/agent/cluster.yml
@@ -15,6 +15,7 @@
         user: ceilometer
         password: ${_param:keystone_ceilometer_password}
         region: ${_param:openstack_region}
+        protocol: ${_param:cluster_internal_protocol}
       message_queue:
         engine: rabbitmq
         members: