diff --git a/en_US.ISO8859-1/books/porters-handbook/book.sgml b/en_US.ISO8859-1/books/porters-handbook/book.sgml
index 518e5c2b74..2aedfa164d 100644
--- a/en_US.ISO8859-1/books/porters-handbook/book.sgml
+++ b/en_US.ISO8859-1/books/porters-handbook/book.sgml
@@ -1,7 +1,7 @@
 <!--
      The FreeBSD Documentation Project
 
-     $FreeBSD: doc/en_US.ISO8859-1/books/porters-handbook/book.sgml,v 1.155 2001/07/08 01:09:49 dd Exp $
+     $FreeBSD: doc/en_US.ISO8859-1/books/porters-handbook/book.sgml,v 1.156 2001/07/13 07:33:25 dd Exp $
 -->
 
 <!DOCTYPE BOOK PUBLIC "-//FreeBSD//DTD DocBook V4.1-Based Extension//EN" [
@@ -2121,6 +2121,13 @@ diff -u -r1.15 pkg-plist
           script.  It will be invoked automatically at
           installation/deinstallation time to determine whether or not
           installation/deinstallation should proceed.</para>
+
+        <para>The script will be run at installation time by
+          <command>pkg_add</command> as
+          <literal>pkg-req &dollar;{PKGNAME} INSTALL</literal>.
+          At deinstallation time it will be run by
+          <command>pkg_delete</command> as
+          <literal>pkg-req &dollar;{PKGNAME} DEINSTALL</literal>.</para>
       </sect1>
 
       <sect1 id="porting-plist">