diff --git a/opencontrail/control/single4_0.yml b/opencontrail/control/single4_0.yml
index a4fae18..df551ef 100644
--- a/opencontrail/control/single4_0.yml
+++ b/opencontrail/control/single4_0.yml
@@ -1,4 +1,5 @@
 classes:
+- service.docker.host
 - service.opencontrail.control.single
 - service.haproxy.proxy.single
 parameters: