diff --git a/games/senken/Makefile b/games/senken/Makefile
index dd788a5f03a9..8387905d86e6 100644
--- a/games/senken/Makefile
+++ b/games/senken/Makefile
@@ -1,24 +1,29 @@
 PORTNAME=	senken
 PORTVERSION=	0.3.0
 PORTREVISION=	16
 CATEGORIES=	games
 MASTER_SITES=	GENTOO
 
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	City simulation game
 
+DEPRECATED=	GENTOO mastersites are no longer available
+EXPIRATION_DATE=	2025-01-27
+
 USES=		gnome pkgconfig sdl
 USE_GNOME=	gtk20
 USE_SDL=	image sdl
+
 GNU_CONFIGURE=	yes
+
 LDFLAGS+=	-lm
 
 post-patch:
 	@${REINPLACE_CMD} -e 's|-I/usr/X11R6/include||g  ; \
 		 s|-L/usr/X11R6/lib||g' ${WRKSRC}/configure
 	@${REINPLACE_CMD} -e '/install-sh -d/d' ${WRKSRC}/Makefile.in
 
 post-install:
 	${STRIP_CMD} ${STAGEDIR}${PREFIX}/bin/*
 
 .include <bsd.port.mk>