diff --git a/devel/z80-asm/Makefile b/devel/z80-asm/Makefile
index 88377e16ca2e..220e42101ae0 100644
--- a/devel/z80-asm/Makefile
+++ b/devel/z80-asm/Makefile
@@ -1,55 +1,61 @@
 PORTNAME=	z80-asm
 PORTVERSION=	2.4.p3
 CATEGORIES=	devel
 MASTER_SITES=	http://wwwhomes.uni-bielefeld.de/achim/z80-asm/
 DISTNAME=	${PORTNAME}-2.3
 DIST_SUBDIR=	z80-asm
 
 PATCH_SITES=	${MASTER_SITES}
 PATCHFILES=	diff_2.3_2.4-pre3.gz
 PATCH_DIST_STRIP=	-p1
 
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Z80 assembly code assembler and disassembler
 WWW=		https://wwwhomes.uni-bielefeld.de/achim/z80-asm.html
 
 LICENSE=	GPLv2
 LICENSE_FILE=	${WRKSRC}/doc/COPYING
 
 USES=		gmake
 
 PORTDOCS=	CHANGELOG README TODO z80-asm.html z80-mon.html
 
 OPTIONS_DEFINE=	DOCS
 
+.include <bsd.port.options.mk>
+
+.if ${OPSYS} == FreeBSD && ${OSVERSION} >= 1400091
+CFLAGS+=	-Wno-error=incompatible-function-pointer-types
+.endif
+
 post-extract:
 	@${TOUCH} ${WRKSRC}/hardware/bus_masters
 
 post-patch:
 	@${REINPLACE_CMD} -e \
 		's|/usr/local|${PREFIX}|g ; \
 		 s|^CC=|CC?=|g ; \
 		 s|=-O2|+=|g ; \
 		 s|make |$$(MAKE) |g ; \
 		 s|gcc |$$(CC) |g'  ${WRKSRC}/Makefile
 	@${REINPLACE_CMD} -e \
 		'/LCD=/s|^|#|g ; \
 		 s|^CC=|CC?=|g ; \
 		 s|=-O2|+=|g ; \
 		 s|gcc |$$(CC) |g ; \
 		 s|-lc ||g' ${WRKSRC}/hardware/Makefile
 
 do-install:
 	${INSTALL_PROGRAM} ${WRKSRC}/z80-asm ${STAGEDIR}${PREFIX}/bin
 	${INSTALL_PROGRAM} ${WRKSRC}/z80-mon ${STAGEDIR}${PREFIX}/bin
 	${INSTALL_MAN} ${WRKSRC}/doc/man/*.1 ${STAGEDIR}${MAN1PREFIX}/man/man1
 	${INSTALL_MAN} ${WRKSRC}/doc/man/*.3 ${STAGEDIR}${MAN3PREFIX}/man/man3
 	${INSTALL_MAN} ${WRKSRC}/doc/man/*.5 ${STAGEDIR}${MAN5PREFIX}/man/man5
 
 do-install-DOCS-on:
 	@${MKDIR} ${STAGEDIR}${DOCSDIR}
 .for file in ${PORTDOCS}
 	${INSTALL_DATA} ${WRKSRC}/doc/${file} ${STAGEDIR}${DOCSDIR}
 .endfor
 
 .include <bsd.port.mk>