diff --git a/x11/xdtm/Makefile b/x11/xdtm/Makefile
index 43a0fbc85ad7..2bfb3e801af0 100644
--- a/x11/xdtm/Makefile
+++ b/x11/xdtm/Makefile
@@ -1,26 +1,30 @@
 PORTNAME=	xdtm
 PORTVERSION=	2.5.8
 PORTREVISION=	2
 CATEGORIES=	x11
 MASTER_SITES=	XCONTRIB/applications
 
 MAINTAINER=	bofh@FreeBSD.org
 COMMENT=	Graphical shell for the X Window System
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/Copyright
 
 USES=		imake xorg
 USE_XORG=	xaw
 
 MAKE_JOBS_UNSAFE=	yes
 
 WRKSRC=		${WRKDIR}/${PORTNAME}
 
-.include <bsd.port.pre.mk>
+.include <bsd.port.options.mk>
 
 .if ${OPSYS} == FreeBSD && ( ${OSVERSION} >= 1400079 || ( ${OSVERSION} >= 1302505 && ${OSVERSION} < 1400000 ))
 CFLAGS+=	-Wno-error=int-conversion
 .endif
 
-.include <bsd.port.post.mk>
+.if ${OPSYS} == FreeBSD && ${OSVERSION} >= 1400091
+CFLAGS+=	-Wno-error=incompatible-function-pointer-types
+.endif
+
+.include <bsd.port.mk>