diff --git a/web/api/app/Controller/MonitorsController.php b/web/api/app/Controller/MonitorsController.php
index 07167b33a..789307795 100644
--- a/web/api/app/Controller/MonitorsController.php
+++ b/web/api/app/Controller/MonitorsController.php
@@ -56,7 +56,7 @@ class MonitorsController extends AppController {
       'joins'      => array(
         array(
           'table' => 'Groups_Monitors',
-          'type'  => 'inner',
+          'type'  => 'left',
           'conditions' => array(
             'Groups_Monitors.MonitorId = Monitor.Id',
           ),