diff --git a/opencontrail/control/control.yml b/opencontrail/control/control.yml
index 9c1d905..fdc4f7d 100644
--- a/opencontrail/control/control.yml
+++ b/opencontrail/control/control.yml
@@ -38,3 +38,8 @@
         port: 9042
       network:
         host: ${_param:cluster_vip_address}
+  linux:
+    system:
+      kernel:
+        modules:
+        - nf_conntrack_ipv4