diff --git a/route.php b/route.php
index 6686518..b03fd9d 100644
--- a/route.php
+++ b/route.php
@@ -520,6 +520,12 @@ class route
     $http = new http ();
     @header ($_SERVER["SERVER_PROTOCOL"]." $getCode ".
              $http->codetext ($getCode));
+    if ($getCode === 401)
+    {
+      // When using the 401 "Authentication required", it must be an
+      // information provided to the caller. Just add it.
+      @header("WWW-Authenticate: Basic realm=\"Authentication needed\"");
+    }
     // TODO : If the output is HTML, add the header line :
     // echo "    <meta name='ROBOTS' content='NOINDEX, NOFOLLOW'>\n";
     require ("domframework/renderer.php");