diff --git a/audio/celt/Makefile b/audio/celt/Makefile
index bd19bcba94f6..9fd641a8d576 100644
--- a/audio/celt/Makefile
+++ b/audio/celt/Makefile
@@ -1,23 +1,26 @@
 # Created by: Edward Tomasz Napierala <trasz@FreeBSD.org>
 
 PORTNAME=	celt
 PORTVERSION=	0.11.3
 PORTREVISION=	3
 CATEGORIES=	audio
 MASTER_SITES=	http://downloads.us.xiph.org/releases/celt/
 
 MAINTAINER=	multimedia@FreeBSD.org
 COMMENT=	The CELT ultra-low delay audio codec
 
 LICENSE=	BSD2CLAUSE
 LICENSE_FILE=	${WRKSRC}/COPYING
 
+DEPRECATED=	Deprecated and considered obsolete by upstream in 2016 in favour of (lib)opus
+EXPIRATION_DATE=2021-12-31
+
 LIB_DEPENDS=	libogg.so:audio/libogg
 
 GNU_CONFIGURE=	yes
 CONFIGURE_ARGS=	--with-ogg=${LOCALBASE}
 USE_LDCONFIG=	yes
 USES=		gmake libtool:keepla pathfix
 INSTALL_TARGET=	install-strip
 
 .include <bsd.port.mk>