diff --git a/en_US.ISO8859-1/books/porters-handbook/book.sgml b/en_US.ISO8859-1/books/porters-handbook/book.sgml
index b0d3427a39..b1848d2076 100644
--- a/en_US.ISO8859-1/books/porters-handbook/book.sgml
+++ b/en_US.ISO8859-1/books/porters-handbook/book.sgml
@@ -670,7 +670,7 @@ PLIST_DIRS=     lib/X11/oneko</programlisting>
 	  <command>autoconf</command> to regenerate
 	  <command>configure</command>, do not take the diffs of
 	  <command>configure</command> (it often grows to a few thousand
-	  lines!); define <literal>USE_AUTOCONF_VER=213</literal> and take the
+	  lines!); define <literal>USE_AUTOTOOLS=autoconf:253</literal> and take the
 	  diffs of <filename>configure.in</filename>.</para>
 
 	<para>Quite often, there is a situation when the software being
@@ -3324,7 +3324,7 @@ PATCHFILES=     patch1:test</programlisting>
 		  compiled from ports and the <makevar>CC</makevar> and
 		  <makevar>CXX</makevar> variables are adjusted.
 		  <makevar>USE_GCC</makevar> can't be used together with
-		  <makevar>USE_LIBTOOL_VER</makevar>.</entry>
+		  <makevar>USE_AUTOTOOLS=libtool:<replaceable>XX</replaceable></makevar>.</entry>
 	      </row>
 
 	    </tbody>