diff --git a/html/includes/authenticate.inc.php b/html/includes/authenticate.inc.php
index 28877973a7..e64465a35e 100644
--- a/html/includes/authenticate.inc.php
+++ b/html/includes/authenticate.inc.php
@@ -110,6 +110,7 @@ if ((isset($_SESSION['username'])) || (isset($_COOKIE['sess_id'],$_COOKIE['token
     $permissions = permissions_cache($_SESSION['user_id']);
     if (isset($_POST['username'])) {
         header('Location: '.$_SERVER['REQUEST_URI'],TRUE,303);
+        exit;
     }
   }
   elseif (isset($_SESSION['username']))