diff --git a/lib/models/resources/ResourceBooking.class.php b/lib/models/resources/ResourceBooking.class.php
index 61a26fe20740cdcf923972dd18e5243488c34476..f925cba58b5bf36d066bb13cf5da7b3d2fd56586 100644
--- a/lib/models/resources/ResourceBooking.class.php
+++ b/lib/models/resources/ResourceBooking.class.php
@@ -1400,6 +1400,7 @@ class ResourceBooking extends SimpleORMap implements PrivacyObject, Studip\Calen
 
     public function getAssignedUserName()
     {
+        $name = '';
         if ($this->getAssignedUserType() === 'course') {
             $name = $this->assigned_course_date->course->getFullname();
             $name .= ' (' . implode(',', $this->assigned_course_date->course->getMembersWithStatus('dozent', true)->limit(3)->getValue('nachname')) . ')';