diff --git a/devel/libarena/Makefile b/devel/libarena/Makefile
index 4371103eabe1..1ff5e8a105be 100644
--- a/devel/libarena/Makefile
+++ b/devel/libarena/Makefile
@@ -1,31 +1,33 @@
 PORTNAME=	libarena
 PORTVERSION=	0.3.7
 CATEGORIES=	devel
 MASTER_SITES=	http://www.25thandclement.com/~william/projects/releases/
 
 MAINTAINER=	rodrigo@FreeBSD.org
 COMMENT=	Custom Memory Allocator Interface
 WWW=		https://www.25thandclement.com/~william/projects/libarena.html
 
 LICENSE=	MIT
 
+DEPRECATED=	Upstream is inactive since 2014
+
 USES=		gmake tar:tgz
 
 PLIST_FILES=	include/arena/align.h \
 		include/arena/arena.h \
 		include/arena/pool.h \
 		include/arena/proto.h \
 		include/arena/rbits.h \
 		include/arena/util.h \
 		lib/libarena.a
 
 post-patch:
 .for i in Epilogue.mk Prologue.mk
 	@${REINPLACE_CMD} -e \
 		'/!=/s|^|#|' ${WRKSRC}/mk/${i}
 .endfor
 	@${REINPLACE_CMD} -e \
 		'/^PREFIX/s|:=|?=|' ${WRKSRC}/mk/Variables.mk
 	${CP} ${WRKSRC}/GNUmakefile ${WRKSRC}/Makefile
 
 .include <bsd.port.mk>