diff --git a/src/Api/Controller/ListUsersController.php b/src/Api/Controller/ListUsersController.php
index fd36e16c7..727d13343 100644
--- a/src/Api/Controller/ListUsersController.php
+++ b/src/Api/Controller/ListUsersController.php
@@ -34,7 +34,7 @@ class ListUsersController extends AbstractCollectionController
      */
     public $sortFields = [
         'username',
-        'postsCount',
+        'commentsCount',
         'discussionsCount',
         'lastSeenTime',
         'joinTime'