Index: head/en_US.ISO8859-1/books/developers-handbook/x86/chapter.xml
===================================================================
--- head/en_US.ISO8859-1/books/developers-handbook/x86/chapter.xml
+++ head/en_US.ISO8859-1/books/developers-handbook/x86/chapter.xml
@@ -6463,8 +6463,8 @@
 </para>
 
 <para>
-Thomas M. Sommers opened the door for me. His
-<link xlink:href="http://www.codebreakers-journal.com/content/view/262/27/">How
+Thomas M. Sommers opened the door for me. His <link
+    xlink:href="https://web.archive.org/web/20090914064615/http://www.codebreakers-journal.com/content/view/262/27">How
 do I write "Hello, world" in FreeBSD assembler?</link>
 web page was my first encounter with an example of
 assembly language programming under FreeBSD.