diff --git a/library/Icingadb/Model/Notification.php b/library/Icingadb/Model/Notification.php
index c2bd5901..b4fa84e2 100644
--- a/library/Icingadb/Model/Notification.php
+++ b/library/Icingadb/Model/Notification.php
@@ -2,6 +2,7 @@
 
 namespace Icinga\Module\Icingadb\Model;
 
+use Icinga\Module\Icingadb\Model\Behavior\Bitmask;
 use Icinga\Module\Icingadb\Model\Behavior\ReRoute;
 use ipl\Orm\Behaviors;
 use ipl\Orm\Model;
@@ -48,6 +49,27 @@ class Notification extends Model
         $behaviors->add(new ReRoute([
             'servicegroup'  => 'service.servicegroup'
         ]));
+        $behaviors->add(new Bitmask([
+            'states' => [
+                'ok'        => 1,
+                'warning'   => 2,
+                'critical'  => 4,
+                'unknown'   => 8,
+                'up'        => 16,
+                'down'      => 32
+            ],
+            'types' => [
+                'downtime_start'    => 1,
+                'downtime_end'      => 2,
+                'downtime_removed'  => 4,
+                'custom'            => 8,
+                'ack'               => 16,
+                'problem'           => 32,
+                'recovery'          => 64,
+                'flapping_start'    => 128,
+                'flapping_end'      => 256
+            ]
+        ]));
     }
 
     public function createRelations(Relations $relations)