diff --git a/includes/defaults.inc.php b/includes/defaults.inc.php
index 5f9d5ca3c7..16e5278af4 100644
--- a/includes/defaults.inc.php
+++ b/includes/defaults.inc.php
@@ -263,6 +263,7 @@ $config['device_traffic_descr'][]  = '/tunnel/';
 $config['device_traffic_descr'][]  = '/:\d+/';
 $config['device_traffic_descr'][]  = '/bond/';
 $config['device_traffic_descr'][]  = '/null/';
+$config['device_traffic_descr'][]  = '/dummy/';
 
 ### IRC Bot configuration