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
@@ -629,8 +629,13 @@
       and confirm the changes with them.</para>
   </sect1>
 
-  <sect1 xml:id="dads-avoiding-linuxisms">
-    <title>Avoiding Linuxisms</title>
+  <sect1 xml:id="dads-use-posix-standards">
+    <title>Use <acronym>POSIX</acronym> Standards</title>
+
+    <para>&os; ports generally expect <acronym>POSIX</acronym>
+      compliance.  Some software and build systems make assumptions
+      based on a particular operating system or environment that can
+      cause problems when used in a port.</para>
 
     <para>Do not use <filename>/proc</filename> if there are any
       other ways of getting the information.  For example,