diff --git a/security/libprelude/Makefile b/security/libprelude/Makefile
index da0a55c2792c..36a5611f875c 100644
--- a/security/libprelude/Makefile
+++ b/security/libprelude/Makefile
@@ -1,43 +1,49 @@
 PORTNAME=	libprelude
 PORTVERSION=	5.2.0
 CATEGORIES=	security
 MASTER_SITES=	https://www.prelude-siem.org/attachments/download/1395/
 
 MAINTAINER=	bofh@FreeBSD.org
 COMMENT=	Sensor support library from Prelude SIEM
 WWW=		https://www.prelude-siem.org/
 
 LICENSE=	GPLv2+
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 LIB_DEPENDS=	libgnutls.so:security/gnutls \
 		libltdl.so:devel/libltdl \
 		libpcre.so:devel/pcre
 
 USES=		libtool localbase pkgconfig
 USE_LDCONFIG=	yes
 
 GNU_CONFIGURE=	yes
 CONFIGURE_ARGS=	--without-lua \
 		--without-python3 \
 		--without-swig \
 		--without-valgrind \
 		ac_cv_path_RUBY=
 
 INSTALL_TARGET=	install-strip
 
 ETCDIR=		${PREFIX}/etc/prelude
 
 OPTIONS_DEFINE=	DOCS PERL
 OPTIONS_SUB=	yes
 
 PERL_USES=		perl5
 PERL_CONFIGURE_WITH=	perl=${PERL}
 
+.include <bsd.port.options.mk>
+
+.if ${OPSYS} == FreeBSD && ${OSVERSION} >= 1400079
+CFLAGS+=	-Wno-error=int-conversion
+.endif
+
 post-install:
 .for f in client.conf global.conf idmef-client.conf tls.conf
 	${MV} ${STAGEDIR}${ETCDIR}/default/${f} \
 		${STAGEDIR}${ETCDIR}/default/${f}.sample
 .endfor
 
 .include <bsd.port.mk>