diff --git a/dns/checkdns/Makefile b/dns/checkdns/Makefile
index f8154487674e..8f9d5f1a5975 100644
--- a/dns/checkdns/Makefile
+++ b/dns/checkdns/Makefile
@@ -16,7 +16,12 @@ SUB_FILES=	pkg-message
 
 PORTDOCS=	AUTHORS COPYING ChangeLog INSTALL README THANKS TODO
 
+OPTIONS_DEFINE=	DOCS
+
 NO_STAGE=	yes
+
+.include <bsd.port.options.mk>
+
 post-patch:
 	@${REINPLACE_CMD} -e 's|/usr/local|${PREFIX}|g' ${WRKSRC}/main.c \
 		${WRKSRC}/INSTALL ${WRKSRC}/README ${WRKSRC}/checkdns.conf-dist
@@ -27,7 +32,7 @@ post-install:
 		${CP} -p ${PREFIX}/etc/checkdns.conf-dist ${PREFIX}/etc/checkdns.conf ; \
 	fi
 
-.if !defined(NOPORTDOCS)
+.if ${PORT_OPTIONS:MDOCS}
 	${MKDIR} ${DOCSDIR}
 .for f in ${PORTDOCS}
 	${INSTALL_MAN} ${WRKSRC}/$f ${DOCSDIR}
diff --git a/dns/dhisd/Makefile b/dns/dhisd/Makefile
index 20f2f756ed50..92becfb16735 100644
--- a/dns/dhisd/Makefile
+++ b/dns/dhisd/Makefile
@@ -17,7 +17,12 @@ LDFLAGS+=	-L${PREFIX}/lib
 
 DOCFILES=	CONTRIBUTORS COPYRIGHT INSTALL MODULES README
 
+OPTIONS_DEFINE=	DOCS
+
 NO_STAGE=	yes
+
+.include <bsd.port.options.mk>
+
 post-patch:
 	${CP} ${FILESDIR}/dhisd.sh ${WRKSRC}/dhisd.sh
 	cd ${WRKSRC} && ${REINPLACE_CMD} -e "s^__PREFIX__^${PREFIX}^g" \
@@ -46,7 +51,7 @@ post-install:
 	@${INSTALL_SCRIPT} -m 751 ${WRKSRC}/dhisd.sh ${PREFIX}/etc/rc.d/dhisd.sh
 	@${ECHO_CMD} "etc/rc.d/dhisd.sh" >> ${TMPPLIST}
 .endif
-.if !defined(NOPORTDOCS)
+.if ${PORT_OPTIONS:MDOCS}
 	@${ECHO_MSG} "===>   Installing documentation in ${DOCSDIR}"
 	@${MKDIR} ${DOCSDIR}
 	@${CHMOD} 755 ${DOCSDIR}
@@ -63,7 +68,7 @@ post-install:
 	@${ECHO} ""
 	@${ECHO} "For more information, see the following site:"
 	@${ECHO} "http://www.dhis.org/dhis/r5/"
-.if !defined(NOPORTDOCS)
+.if ${PORT_OPTIONS:MDOCS}
 	@${ECHO} ""
 	@${ECHO} "or the files in ${DOCSDIR}"
 	@${ECHO} "Read INSTALL and INSTALL.bsd at least for the setup information of dhisd."
diff --git a/dns/posadis/Makefile b/dns/posadis/Makefile
index 5b6d36d72526..3622c6c59f03 100644
--- a/dns/posadis/Makefile
+++ b/dns/posadis/Makefile
@@ -18,6 +18,9 @@ CPPFLAGS+=	-I${LOCALBASE}/include
 LDFLAGS+=	-L${LOCALBASE}/lib
 NO_STAGE=	yes
 
+OPTIONS_DEFINE=	DOCS
+.include <bsd.port.options.mk>
+
 .if defined(WITH_FAM) || exists(${LOCALBASE}/lib/libfam.so)
 CONFIGURE_ARGS=	--enable-fam
 BUILD_DEPENDS=	${LOCALBASE}/include/fam.h:${PORTSDIR}/devel/fam
@@ -34,7 +37,7 @@ MAN1=		getzone.1 posadis.1 posadis-getroots.1 posask.1 poshost.1
 MAN5=		posadisrc.5
 DOCS=		AUTHORS ChangeLog README TODO
 
-.if !defined(NOPORTDOCS)
+.if ${PORT_OPTIONS:MDOCS}
 post-install:
 	@${MKDIR} ${DOCSDIR}
 	cd ${WRKSRC} && ${INSTALL_DATA} ${DOCS} ${DOCSDIR}