diff --git a/designate/server/cluster.yml b/designate/server/cluster.yml
index 1030861..afbb7df 100644
--- a/designate/server/cluster.yml
+++ b/designate/server/cluster.yml
@@ -6,6 +6,7 @@
 parameters:
   _param:
     designate_admin_api_enabled: false
+    cluster_internal_protocol: 'http'
   linux:
     system:
       package:
@@ -41,6 +42,7 @@
         tenant: service
         user: designate
         password: ${_param:keystone_designate_password}
+        protocol: ${_param:cluster_internal_protocol}
       bind:
         api:
           address: ${_param:single_address}