diff --git a/doc/index.html b/doc/index.html
index 0163022..58fd8d0 100644
--- a/doc/index.html
+++ b/doc/index.html
@@ -124,7 +124,9 @@
 <li>DocBook SGML v4: libxml2 includes a hackish parser to transition to
   XML</li>
 </ul>
-<p>
+<p>Libxml2 is known to be very portable, should build and work without
+serious troubles on a variety of systems (Linux, Unix, Windows, CygWin,
+MacOs, MacOsX, RISC Os, OS/2, VMS, QNX, MVS, ...)</p>
 <p>Separate documents:</p>
 <ul>
 <li>