diff --git a/math/intervaltree/Makefile b/math/intervaltree/Makefile
index 7bed7fb2dfc7..3e38fb069a22 100644
--- a/math/intervaltree/Makefile
+++ b/math/intervaltree/Makefile
@@ -1,27 +1,30 @@
 PORTNAME=	intervaltree
 DISTVERSION=	g20151213
 PORTREVISION=	2
 CATEGORIES=	math
 
 MAINTAINER=	jwb@FreeBSD.org
 COMMENT=	Minimal C++ interval tree implementation
 
 LICENSE=	MIT
 
+DEPRECATED=		Dependent ports now use GH_TUPLE
+EXPIRATION_DATE=	2022-07-22
+
 USES=		compiler:c++0x
 USE_GITHUB=	yes
 GH_ACCOUNT=	ekg
 GH_TAGNAME=	8fc4be91866237995e1105689d84bece619f4663
 
 INSTALL_TARGET=	install-strip
 PLIST_FILES=	bin/interval_tree_test include/${PORTNAME}/IntervalTree.h
 
 .include <bsd.port.pre.mk>
 
 .if ${ARCH} == i386 || ${ARCH} == powerpc
 post-patch:
 	${REINPLACE_CMD} -e 's|<bool, unsigned long>|<bool, unsigned int>|g' \
 		${WRKSRC}/interval_tree_test.cpp
 .endif
 
 .include <bsd.port.post.mk>