diff --git a/net/tcpkali/Makefile b/net/tcpkali/Makefile
index 1307e8bbe2b3..8d677d33f3fa 100644
--- a/net/tcpkali/Makefile
+++ b/net/tcpkali/Makefile
@@ -1,34 +1,36 @@
 PORTNAME=	tcpkali
 PORTVERSION=	1.1.1.20180104
 PORTREVISION=	2
 DISTVERSIONPREFIX=	v
 CATEGORIES=	net
 
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	High performance load generator for TCP and WebSocket servers
 WWW=		https://github.com/satori-com/tcpkali
 
 LICENSE=	BSD2CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 LIB_DEPENDS=	libev.so:devel/libev
 
+FORBIDDEN=	possible backdoor issue
+
 GNU_CONFIGURE=	yes
 USES=		autoreconf compiler:c11 libtool gmake ncurses localbase
 USE_GITHUB=	yes
 GH_ACCOUNT=	machinezone
 GH_TAGNAME=	3c3175e417366c7ccafba56454903690fede501a
 
 LIBS=		-lpthread -lev
 
 PLIST_FILES=	bin/${PORTNAME} \
 		share/man/man1/${PORTNAME}.1.gz
 
 post-extract:
 	${RM} -r ${WRKSRC}/deps/libev
 
 do-install:
 	${INSTALL_PROGRAM} ${WRKSRC}/src/${PORTNAME} ${STAGEDIR}${PREFIX}/bin
 	${INSTALL_MAN} ${WRKSRC}/doc/${PORTNAME}.1 ${STAGEDIR}${PREFIX}/share/man/man1
 
 .include <bsd.port.mk>