diff --git a/mod/workshop/allocation/random/lib.php b/mod/workshop/allocation/random/lib.php
index f878fe72f1f..ffed33cad42 100644
--- a/mod/workshop/allocation/random/lib.php
+++ b/mod/workshop/allocation/random/lib.php
@@ -164,13 +164,14 @@ class workshop_random_allocator implements workshop_allocator {
             // by reviewer
             $result->log(get_string('numofdeallocatedassessment', 'workshopallocation_random', count($delassessments)), 'info');
             foreach ($delassessments as $delassessmentkey => $delassessmentid) {
-                $a = new stdclass();
-                $a->authorname      = fullname((object)array(
-                        'lastname'  => $assessments[$delassessmentid]->authorlastname,
-                        'firstname' => $assessments[$delassessmentid]->authorfirstname));
-                $a->reviewername    = fullname((object)array(
-                        'lastname'  => $assessments[$delassessmentid]->reviewerlastname,
-                        'firstname' => $assessments[$delassessmentid]->reviewerfirstname));
+                $author = (object) [];
+                $reviewer = (object) [];
+                username_load_fields_from_object($author, $assessments[$delassessmentid], 'author');
+                username_load_fields_from_object($reviewer, $assessments[$delassessmentid], 'reviewer');
+                $a = [
+                    'authorname' => fullname($author),
+                    'reviewername' => fullname($reviewer),
+                ];
                 if (!is_null($assessments[$delassessmentid]->grade)) {
                     $result->log(get_string('allocationdeallocategraded', 'workshopallocation_random', $a), 'error', 1);
                     unset($delassessments[$delassessmentkey]);