diff --git a/app/controllers/admin/courseplanning.php b/app/controllers/admin/courseplanning.php
index 3c399f2c8f4eeb99e5fdc21919027ee86c70981f..4b6597537e5f743c1e5ae3b9aaca73a04a4c0903 100644
--- a/app/controllers/admin/courseplanning.php
+++ b/app/controllers/admin/courseplanning.php
@@ -851,7 +851,7 @@ class Admin_CourseplanningController extends AuthenticatedController
         }
 
         $seminars   = array_map('reset', $courses);
-        $visit_data = get_objects_visits(array_keys($seminars), 'sem', null, null, MyRealmModel::getDefaultModules());
+        $visit_data = get_objects_visits(array_keys($seminars), 'sem', null, null, array_keys(MyRealmModel::getDefaultModules()));
 
         if (!empty($seminars)) {
             foreach ($seminars as $seminar_id => $seminar) {