diff --git a/security/fl0p/Makefile b/security/fl0p/Makefile
index 7f35b2bc52fa..3c946424e105 100644
--- a/security/fl0p/Makefile
+++ b/security/fl0p/Makefile
@@ -1,44 +1,47 @@
 PORTNAME=	fl0p
 PORTVERSION=	0.0.2.b
 CATEGORIES=	security
 MASTER_SITES=	http://lcamtuf.coredump.cx/soft/
 DISTNAME=	fl0p-devel
 
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Passive L7 flow fingerprinting tool
 
 LICENSE=	LGPL21
 LICENSE_FILE=	${WRKSRC}/doc/COPYING
 
+DEPRECATED=	Abandonware, last release in 2006 and no longer relevant
+EXPIRATION_DATE=2024-02-29
+
 USES=		tar:tgz
 WRKSRC=		${WRKDIR}/${PORTNAME}
 
 PORTDOCS=	ChangeLog CREDITS README TODO
 PLIST_FILES=	bin/fl0p %%DATADIR%%/fl0p.fp
 
 OPTIONS_DEFINE=	DOCS
 
 post-patch:
 	@${REINPLACE_CMD} -e \
 		's|"/etc/fl0p"|"${DATADIR}"|' ${WRKSRC}/config.h
 	@${REINPLACE_CMD} -e \
 		's|^MAKE_CMD_OK|#MAKE_CMD_OK|' ${WRKSRC}/Build
 	@${REINPLACE_CMD} -e \
 		'/^CC/s|\([[:blank:]]\)=|\1?=| ; \
 		 /^CFLAGS/s|\([[:blank:]]\)=|\1+=| ; \
 		 s|-g -ggdb|| ; \
 		 s|-I.*|$$(CPPFLAGS)| ; \
 		 /^all:/s|strip||' ${WRKSRC}/mk/Linux
 
 do-install:
 	${INSTALL_PROGRAM} ${WRKSRC}/fl0p ${STAGEDIR}${PREFIX}/bin
 	@${MKDIR} ${STAGEDIR}${DATADIR}
 	${INSTALL_DATA} ${WRKSRC}/fl0p.fp ${STAGEDIR}${DATADIR}
 
 do-install-DOCS-on:
 	@${MKDIR} ${STAGEDIR}${DOCSDIR}
 .for i in ${PORTDOCS}
 	${INSTALL_DATA} ${WRKSRC}/doc/${i} ${STAGEDIR}${DOCSDIR}
 .endfor
 
 .include <bsd.port.mk>