diff --git a/security/nss_compat_ossl/Makefile b/security/nss_compat_ossl/Makefile
index 977c42e3b933..cec95fd3762d 100644
--- a/security/nss_compat_ossl/Makefile
+++ b/security/nss_compat_ossl/Makefile
@@ -1,23 +1,31 @@
 PORTNAME=	nss_compat_ossl
 PORTVERSION=	0.9.6
 PORTREVISION=	1
 CATEGORIES=	security devel
 MASTER_SITES=	http://rcritten.fedorapeople.org/
 
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Source-level compatibility library for OpenSSL to NSS porting
 WWW=		http://rcritten.fedorapeople.org/nss_compat_ossl.html
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 LIB_DEPENDS=	libnspr4.so:devel/nspr \
 		libnss3.so:security/nss
 
-GNU_CONFIGURE=	yes
 USES=		cpe pkgconfig libtool
 CPE_VENDOR=	${PORTNAME}_project
-INSTALL_TARGET=	install-strip
 USE_LDCONFIG=	yes
 
+GNU_CONFIGURE=	yes
+
+INSTALL_TARGET=	install-strip
+
+.include <bsd.port.options.mk>
+
+.if ${OPSYS} == FreeBSD && ( ${OSVERSION} >= 1400079 || ( ${OSVERSION} >= 1302505 && ${OSVERSION} < 1400000 ))
+CFLAGS+=	-Wno-error=int-conversion
+.endif
+
 .include <bsd.port.mk>