diff --git a/modules/monitoring/application/controllers/AlertsummaryController.php b/modules/monitoring/application/controllers/AlertsummaryController.php
index aea8def93..dcc805286 100644
--- a/modules/monitoring/application/controllers/AlertsummaryController.php
+++ b/modules/monitoring/application/controllers/AlertsummaryController.php
@@ -6,6 +6,7 @@ use Icinga\Chart\Unit\LinearUnit;
 use Icinga\Chart\Unit\StaticAxis;
 use Icinga\Module\Monitoring\Controller;
 use Icinga\Module\Monitoring\Web\Widget\SelectBox;
+use Icinga\Web\Widget\Tabextension\DashboardAction;
 use Icinga\Web\Url;
 
 class Monitoring_AlertsummaryController extends Controller
@@ -44,7 +45,7 @@ class Monitoring_AlertsummaryController extends Controller
                 'label' => $this->translate('Alert Summary'),
                 'url'   => Url::fromRequest()
             )
-        )->activate('alertsummary');
+        )->extend(new DashboardAction())->activate('alertsummary');
         $this->view->title = $this->translate('Alert Summary');
 
         $this->view->intervalBox = $this->createIntervalBox();