diff --git a/x11-wm/gcompmgr/Makefile b/x11-wm/gcompmgr/Makefile
index fa603839fa2f..73b5465ab918 100644
--- a/x11-wm/gcompmgr/Makefile
+++ b/x11-wm/gcompmgr/Makefile
@@ -1,37 +1,40 @@
 # Created by: UMENO Takashi
 
 PORTNAME=	gcompmgr
 PORTVERSION=	0.21
 PORTREVISION=	13
 CATEGORIES=	x11-wm
 MASTER_SITES=	SF/${PORTNAME}/${PORTNAME}/${PORTNAME}-${PORTVERSION}
 
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	GNOME interface to xcompmgr
 
+DEPRECATED=	Abandonware since 2005, using discontinued libraries
+EXPIRATION_DATE=	2021-08-19
+
 RUN_DEPENDS=	xcompmgr:x11-wm/xcompmgr
 
 GNU_CONFIGURE=	yes
 LIBS+=		-L${LOCALBASE}/lib -lX11
 USES=		compiler:c++11-lang autoreconf gnome libtool pkgconfig xorg
 USE_CXXSTD=	c++11
 USE_GNOME=	gtkmm24
 USE_XORG=	x11
 
 DESKTOP_ENTRIES="gcompmgr" \
 		"Configure window effects" \
 		"" \
 		"gcompmgr" \
 		"DesktopSettings;Settings;GTK;" \
 		true
 
 OPTIONS_DEFINE=	DOCS
 
 post-patch:
 	@${RM} ${WRKSRC}/INSTALL
 	@${REINPLACE_CMD} -e '/^CXXFLAGS=""/d' ${WRKSRC}/configure.in
 	@${REINPLACE_CMD} -e 's|connect(SigC::slot|connect(sigc::mem_fun|g ; \
 		s|#include <sigc++\/compatibility\.h>||g' \
 			${WRKSRC}/src/*.cc
 
 .include <bsd.port.mk>