diff --git a/security/arirang/Makefile b/security/arirang/Makefile
index ad1a969cc6d3..025c1aaa461c 100644
--- a/security/arirang/Makefile
+++ b/security/arirang/Makefile
@@ -1,43 +1,44 @@
 # Created by: Roman Shterenzon <roman@xpert.com>
 
 PORTNAME=	arirang
 PORTVERSION=	2.03
 PORTREVISION=	1
 PORTEPOCH=	1
 CATEGORIES=	security www
 MASTER_SITES=	http://monkey.org/~pilot/arirang/
 
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Powerful webserver security scanner for network
 
 LICENSE=	BSD3CLAUSE
 
 DEPRECATED=	Abandoned upstream and last release was back in 2011
 EXPIRATION_DATE=2022-03-31
 
 LIB_DEPENDS=	libruby${RUBY_SHLIBVER}.so:${RUBY_PORT}
 
 USES=		compiler:c11 ssl
 USE_RUBY=	yes
 USE_RUBY_EXTCONF=	yes
 
+CFLAGS+=	-fdeclspec
 CFLAGS+=	-I${LOCALBASE}/include/ruby-${RUBY_VER} -I${LOCALBASE}/include/ruby-${RUBY_VER}/${RUBY_ARCH}
 CFLAGS+=	-DRUBY_19
 
 .include <bsd.port.pre.mk>
 
 .if ${SSL_DEFAULT} != base
 CFLAGS+=	-I${OPENSSLINC}
 LDFLAGS+=	-L${OPENSSLLIB}
 .endif
 
 post-patch:
 	${REINPLACE_CMD} -e 's#cc#${CC}#g' ${WRKSRC}/extconf.rb
 
 do-install:
 	${INSTALL_PROGRAM} ${WRKSRC}/arirang ${STAGEDIR}${PREFIX}/sbin
 	@${MKDIR} ${STAGEDIR}${PREFIX}/share/arirang
 	${INSTALL_DATA} ${WRKSRC}/scanrule/*.uxe ${STAGEDIR}${PREFIX}/share/arirang
 	${INSTALL_DATA} ${WRKSRC}/script/*.rb ${STAGEDIR}${PREFIX}/share/arirang
 
 .include <bsd.port.post.mk>