diff --git a/classes/cluster/virtual-mcp10-contrail/openstack/init.yml b/classes/cluster/virtual-mcp10-contrail/openstack/init.yml
index ed8513a..81ac134 100755
--- a/classes/cluster/virtual-mcp10-contrail/openstack/init.yml
+++ b/classes/cluster/virtual-mcp10-contrail/openstack/init.yml
@@ -1,6 +1,7 @@
 parameters:
   _param:
     openstack_version: mitaka
+    apt_mk_version: nightly
     openstack_region: RegionOne
     admin_email: root@localhost
     cluster_public_host: _