diff --git a/dns/libdjbdns/Makefile b/dns/libdjbdns/Makefile
index 40cc285d2ee3..e44f1064ac98 100644
--- a/dns/libdjbdns/Makefile
+++ b/dns/libdjbdns/Makefile
@@ -1,30 +1,33 @@
 PORTNAME=	libdjbdns
 PORTVERSION=	1.05
 PORTREVISION=	2
 CATEGORIES=	dns
 MASTER_SITES=	http://smarden.org/pape/djb/manpages/
 DISTNAME=	djbdns-pd-${PORTVERSION}
 
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Public domain DNS client library
 WWW=		https://cr.yp.to/djbdns/dns.html
 
+DEPRECATED=	No longer compliant with current DNS standards and source code hasn't been centrally managed for over 20 years
+EXPIRATION_DATE=2023-06-30
+
 USES=		gmake
 
 USE_LDCONFIG=	yes
 ALL_TARGET=	it
 
 LIBS=		libdjbdns.a libdjbdns.so.1
 INCLUDES=	alloc.h byte.h case.h dns.h env.h error.h fmt.h \
 		gen_alloc.h gen_allocdefs.h iopause.h ip4.h ndelay.h \
 		open.h openreadclose.h readclose.h scan.h select.h \
 		socket.h str.h stralloc.h tai.h taia.h uint16.h \
 		uint32.h uint64.h
 
 do-install:
 	@${MKDIR} ${STAGEDIR}${PREFIX}/include/libdjbdns
 	cd ${WRKSRC} && \
 		${INSTALL_LIB} ${LIBS} ${STAGEDIR}${PREFIX}/lib && \
 		${INSTALL_DATA} ${INCLUDES} ${STAGEDIR}${PREFIX}/include/libdjbdns
 
 .include <bsd.port.mk>