diff --git a/src/opnsense/service/templates/OPNsense/IPFW/ipfw.conf b/src/opnsense/service/templates/OPNsense/IPFW/ipfw.conf
index 01f874214..ec45d994a 100644
--- a/src/opnsense/service/templates/OPNsense/IPFW/ipfw.conf
+++ b/src/opnsense/service/templates/OPNsense/IPFW/ipfw.conf
@@ -31,7 +31,8 @@ flush
 {% for pipe in OPNsense.TrafficShaper.pipes.pipe %}
 pipe {{ pipe.number }} config bw {{ pipe.bandwidth }}{{ pipe.bandwidthMetric }}/s {%
  if pipe.queue %} queue {{ pipe.queue }} {%
- if pipe.queueMetric != 'slots' %} {{pipe.queueMetric}}  {% endif %}  {% endif %}
+ if pipe.queueMetric != 'slots' %} {{pipe.queueMetric}}  {% endif %}  {% endif
+ %} {% if pipe.mask != 'none' %} mask {{ pipe.mask }} 0xffffffff {% endif %}
 
 {% endfor %}
 {% endif %}