diff --git a/app/controllers/course/basicdata.php b/app/controllers/course/basicdata.php
index 74758138bfc1b8fd95cbf5394b4252b45d546af2..a94a7a48037ef61273eef3fd157cc21c3ccc84f5 100644
--- a/app/controllers/course/basicdata.php
+++ b/app/controllers/course/basicdata.php
@@ -383,7 +383,7 @@ class Course_BasicdataController extends AuthenticatedController
             );
         }
         $sidebar->addWidget($widget);
-        if ($GLOBALS['perm']->have_studip_perm('admin', $this->course->id)) {
+        if ($GLOBALS['perm']->have_studip_perm('admin', $this->course_id)) {
             $widget = new CourseManagementSelectWidget();
             $sidebar->addWidget($widget);
         }