diff --git a/opencontrail/control/single.yml b/opencontrail/control/single.yml
index efdc267..064418e 100644
--- a/opencontrail/control/single.yml
+++ b/opencontrail/control/single.yml
@@ -12,6 +12,9 @@
           version: 1.0.1-0contrail1
         contrail-api-cli:
           version: latest
+      kernel:
+        modules:
+        - nf_conntrack_ipv4
   haproxy:
     proxy:
       listen: