diff --git a/en_US.ISO8859-1/books/porters-handbook/book.sgml b/en_US.ISO8859-1/books/porters-handbook/book.sgml
index 547e6fd213..9496d08f2d 100644
--- a/en_US.ISO8859-1/books/porters-handbook/book.sgml
+++ b/en_US.ISO8859-1/books/porters-handbook/book.sgml
@@ -2996,11 +2996,11 @@ PORTVERSION=   1.0</programlisting>
 	  extracted into a directory called <filename>foo</filename> (and not
 	  <filename>foo-1.0</filename>) you would write:</para>
 
-	<programlisting>WRKSRC=      foo</programlisting>
+	<programlisting>WRKSRC=      ${WRKDIR}/foo</programlisting>
 
 	<para>or possibly</para>
 
-	<programlisting>WRKSRC=      ${PORTNAME}</programlisting>
+	<programlisting>WRKSRC=      ${WRKDIR}/${PORTNAME}</programlisting>
       </sect2>
 
       <sect2>