--- a/CHANGES.html	Mon May 06 00:50:09 2013 +0200
+++ b/CHANGES.html	Sun May 05 22:41:07 2013 -0700
@@ -170,7 +170,9 @@
 </ul>
 <h2>Changes to build system:</h2>
 <ul>
-<li></li>
+<li>Waf shipped with ns-3 has been upgraded to version 1.7.10 and custom
+  pkg-config generator has been replaced by Waf's builtin tool.
+</li>
 </ul>
 
 <h2>Changed behavior:</h2>