diff --git a/opencontrail/compute.sls b/opencontrail/compute.sls
index 117ca83..27839e1 100644
--- a/opencontrail/compute.sls
+++ b/opencontrail/compute.sls
@@ -181,6 +181,7 @@
     - name: "vrouter --flow_hold_limit {{ compute.flow_hold_limit }}"
     - onchanges:
       - file: /etc/modprobe.d/vrouter.conf
+    - unless: "lsmod | ( ! grep -q vrouter )"
 
 {%- endif %}