Index: head/en_US.ISO8859-1/books/porters-handbook/porting-dads/chapter.xml
===================================================================
--- head/en_US.ISO8859-1/books/porters-handbook/porting-dads/chapter.xml
+++ head/en_US.ISO8859-1/books/porters-handbook/porting-dads/chapter.xml
@@ -363,6 +363,14 @@
     </note>
   </sect1>
 
+  <sect1 xml:id="dads-arch-neutral">
+    <title>Marking a Port as Architecture Neutral</title>
+
+    <para>Ports that do not have any architecture-dependent files
+      or requirements are identified by setting
+      <literal>NO_ARCH=yes</literal>.</para>
+  </sect1>
+
   <sect1 xml:id="dads-noinstall">
     <title>Marking a Port Not Installable with
       <varname>BROKEN</varname>, <varname>FORBIDDEN</varname>, or