diff --git a/en_US.ISO8859-1/books/porters-handbook/makefiles/chapter.xml b/en_US.ISO8859-1/books/porters-handbook/makefiles/chapter.xml
index effafd103b..68e0074a46 100644
--- a/en_US.ISO8859-1/books/porters-handbook/makefiles/chapter.xml
+++ b/en_US.ISO8859-1/books/porters-handbook/makefiles/chapter.xml
@@ -3516,6 +3516,7 @@ BAR_DESC=	Support feature bar
 
 OPTIONS_DEFAULT=FOO
 
+# Will add --with-foo / --without-foo
 FOO_CONFIGURE_WITH=	foo
 BAR_RUN_DEPENDS=	bar:${PORTSDIR}/bar/bar
 
@@ -3533,7 +3534,8 @@ CONFIGURE_ARGS+=--without-examples
 	  <para>Though, you should use the following so that the
 	    configure knob is really enabled and disabled when the
 	    option is.</para>
-	  <programlisting>EXAMPLES_CONFIGURE_WITH=	examples</programlisting>
+	  <programlisting># Will add --with-examples / --without-examples
+EXAMPLES_CONFIGURE_WITH=	examples</programlisting>
 	</example>
 
 	<example xml:id="ports-options-practical-use">
@@ -3558,10 +3560,12 @@ SSL_DESC=		Build with OpenSSL support
 OPTIONS_DEFAULT=	PGSQL LDAP SSL
 
 PGSQL_USE=	pgsql=yes
-PGSQL_CONFIGURE_WITH=	postgres
+# Will add --enable-postgres / --disable-postgres
+PGSQL_CONFIGURE_ENABLE=	postgres
 
 ICU_LIB_DEPENDS=	libicuuc.so:${PORTSDIR}/devel/icu
 
+# Will add --with-examples / --without-examples
 EXAMPLES_CONFIGURE_WITH=	examples
 
 # Check other OPTIONS
@@ -3639,6 +3643,7 @@ CONFIGURE_ARGS+=	--enable-foo
 	<title>Correct Handling of an Option</title>
 
 	<programlisting>FOO_LIB_DEPENDS=		libfoo.so:${PORTSDIR}/devel/foo
+# Will add --enable-foo / --disable-foo
 FOO_CONFIGURE_ENABLE=	foo</programlisting>
       </example>