diff --git a/include/ws_functions/pwg.categories.php b/include/ws_functions/pwg.categories.php
index 70e226e5b..077021357 100644
--- a/include/ws_functions/pwg.categories.php
+++ b/include/ws_functions/pwg.categories.php
@@ -322,7 +322,7 @@ SELECT SQL_CALC_FOUND_ROWS
   if (isset($params['limit']))
   {
     $query .= '
-  ORDER BY rank ASC 
+  ORDER BY \'rank\' ASC 
   LIMIT '.($params['limit'] + ($params['cat_id'] > 0 ? 1 : 0));
   }