diff --git a/tz-link.htm b/tz-link.htm
index a09239f..3c83373 100644
--- a/tz-link.htm
+++ b/tz-link.htm
@@ -21,6 +21,10 @@
 %W%
 </address>
 <p>
+This file is in the public domain, so clarified as of
+2009-05-17 by Arthur David Olson.
+</p>
+<p>
 Please send corrections to this web page to the
 <a href="mailto:tz@elsie.nci.nih.gov">time zone mailing list</a>.</p>
 <h2>The <code>tz</code> database</h2>