diff --git a/textproc/rman/Makefile b/textproc/rman/Makefile
index 559ad3cb4c9f..e39d7c96a0f2 100644
--- a/textproc/rman/Makefile
+++ b/textproc/rman/Makefile
@@ -1,17 +1,23 @@
 PORTNAME=	rman
 PORTVERSION=	3.2
 CATEGORIES=	textproc
 MASTER_SITES=	SF/polyglotman/polyglotman/${PORTVERSION}
 
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Reverse compile man pages from formatted form
 
 MAKE_ARGS=	CC="${CC}" CFLAGS="${CFLAGS}" \
 		BINDIR="${PREFIX}/bin" MANDIR="${MAN1PREFIX}/man/man1"
 
 PLIST_FILES=	bin/rman man/man1/rman.1.gz
 
+.include <bsd.port.options.mk>
+
+.if ${OPSYS} == FreeBSD && ${OSVERSION} >= 1400091
+CFLAGS+=	-Wno-error=incompatible-function-pointer-types
+.endif
+
 post-install:
 	@${STRIP_CMD} ${STAGEDIR}${PREFIX}/bin/rman
 
 .include <bsd.port.mk>