diff --git a/src/AccessStorage.php b/src/AccessStorage.php
index 50961ce..0ba6726 100644
--- a/src/AccessStorage.php
+++ b/src/AccessStorage.php
@@ -381,7 +381,7 @@ class AccessStorage implements AccessStorageInterface {
       foreach ($aAllowedUsers as $oUser) {
         $iUid = intval($oUser->id());
         if ($iUid !== 0) {
-          $sUsername = $oUser->getUsername();
+          $sUsername = $oUser->getDisplayName();
         }
         else {
           $sUsername = t('Anonymous User');
diff --git a/src/Controller/PermissionsByTermController.php b/src/Controller/PermissionsByTermController.php
index c35448d..4458751 100644
--- a/src/Controller/PermissionsByTermController.php
+++ b/src/Controller/PermissionsByTermController.php
@@ -71,7 +71,7 @@ class PermissionsByTermController extends ControllerBase {
 
     foreach ($aUserIds as $iUserId) {
       $oUser = user_load($iUserId);
-      $matches[$prefix . $oUser->getUsername()] = Html::escape($oUser->getUsername());
+      $matches[$prefix . $oUser->getDisplayName()] = Html::escape($oUser->getDisplayName());
     }
 
     return new JsonResponse($matches);