diff --git a/include/class_plugin.inc b/include/class_plugin.inc
index fa517483faab1172124a9ee5f2de12deadd4a34e..729d0749503c2faaf98cabbf09aeae218b82669a 100644
--- a/include/class_plugin.inc
+++ b/include/class_plugin.inc
@@ -703,7 +703,7 @@ class plugin
           $length = $args[0];
         }
         $res = '';
-        for ($i = 0; $i < $args[0]; ++$i) {
+        for ($i = 0; $i < $length; ++$i) {
           switch ($chars) {
             case 'l':
               $res .= (string)rand(0, 9);