diff --git a/auth.php b/auth.php
index 7f54cdf..5a18701 100644
--- a/auth.php
+++ b/auth.php
@@ -78,6 +78,8 @@ class auth
       $res .= "<h1>".$this->appName."</h1>\n";
     $res .= "  <form class='form-signin' role='form' method='post' ";
     $res .= "action='";
+    if ($url === "/")
+      $url = "";
     if ($url === "")
       $res .= "#";
     else