diff --git a/devel/rubygem-unicode/Makefile b/devel/rubygem-unicode/Makefile
index 80b0f11e736c..2dd1cd924632 100644
--- a/devel/rubygem-unicode/Makefile
+++ b/devel/rubygem-unicode/Makefile
@@ -1,14 +1,20 @@
 PORTNAME=	unicode
 PORTVERSION=	0.4.4.4
 CATEGORIES=	devel rubygems
 MASTER_SITES=	RG
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	Unicode string manipulation library for Ruby
 WWW=		http://www.yoshidam.net/Ruby.html #unicode
 
 LICENSE=	RUBY
 
 USES=		gem
 
+.include <bsd.port.options.mk>
+
+.if ${OPSYS} == FreeBSD && ${OSVERSION} >= 1400091
+CONFIGURE_ARGS+=	--with-cflags="-Wno-error=incompatible-function-pointer-types"
+.endif
+
 .include <bsd.port.mk>