diff --git a/comms/gtkmmorse/Makefile b/comms/gtkmmorse/Makefile
index 54976c454863..187dd0139ba8 100644
--- a/comms/gtkmmorse/Makefile
+++ b/comms/gtkmmorse/Makefile
@@ -1,29 +1,32 @@
 PORTNAME=	gtkmmorse
 DISTVERSION=	0.9.28
 CATEGORIES=	comms education hamradio
 MASTER_SITES=	https://cgit.git.savannah.gnu.org/cgit/${PORTNAME}.git/snapshot/
 
 MAINTAINER=	hamradio@FreeBSD.org
 COMMENT=	Graphical Morse Code Trainer
 WWW=		https://gtkmmorse.nongnu.org/ \
 		https://www.nongnu.org/gtkmmorse/
 
 LICENSE=	GPLv2+
 
+DEPRECATED=	Depends on expired devel/gconfmm26
+EXPIRATION_DATE=2025-11-25
+
 LIB_DEPENDS=	libao.so:audio/libao \
 		libgconfmm-2.6.so:devel/gconfmm26
 
 USES=		autoreconf compiler:c++11-lang gnome pkgconfig
 USE_CXXSTD=	c++11
 USE_GNOME=	gconf2 gtkmm24
 
 GNU_CONFIGURE=	yes
 
 PLIST_FILES=	bin/gtkmmorse \
 		share/man/man1/gtkmmorse.1.gz
 
 post-patch:
 	@${REINPLACE_CMD} -e 's|-ansi||g' -e 's|-pedantic||g' \
 		${WRKSRC}/src/Makefile.am
 
 .include <bsd.port.mk>