diff --git a/index.php b/index.php
index 9d5f25ea..27335a36 100644
--- a/index.php
+++ b/index.php
@@ -436,7 +436,7 @@ function ban_canLogin($conf)
     else
     {
         ban_loginFailed($conf);
-        $redir = '&username='. $_POST['login'];
+        $redir = '&username='. urlencode($_POST['login']);
         if (isset($_GET['post'])) {
             $redir .= '&post=' . urlencode($_GET['post']);
             foreach (array('description', 'source', 'title', 'tags') as $param) {