diff --git a/Y/Ada-S2/tps.html b/Y/Ada-S2/tps.html
index abfd590..faa96f9 100644
--- a/Y/Ada-S2/tps.html
+++ b/Y/Ada-S2/tps.html
@@ -7,6 +7,7 @@ See http://ocsigen.org/ and http://caml.inria.fr/ for information -->
   <title>TP Ada S2</title>
   <meta content="text/html; charset=utf-8" http-equiv="content-type" />
   <link media="all" href="../ystyle.css" rel="stylesheet" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
   <script src="../Scripts/yfold.js"></script>
 </head>