diff --git a/include/ws_functions/pwg.php b/include/ws_functions/pwg.php
index 86457c84b..d502c9388 100644
--- a/include/ws_functions/pwg.php
+++ b/include/ws_functions/pwg.php
@@ -912,6 +912,7 @@ SELECT
       continue;
     }
 
+    $user_name = '#unknown';
     $user_string = '';
     if (isset($username_of[$line['user_id']]))
     {