diff --git a/math/octave-forge-geometry/Makefile b/math/octave-forge-geometry/Makefile
index 21a96cfa642d..37d33b5429ec 100644
--- a/math/octave-forge-geometry/Makefile
+++ b/math/octave-forge-geometry/Makefile
@@ -1,21 +1,23 @@
 PORTNAME=	octave-forge-geometry
 PORTVERSION=	4.1.0
 PORTREVISION=	1
 CATEGORIES=	math
 MASTER_SITES=	SF/octave/Octave%20Forge%20Packages/Individual%20Package%20Releases
 DISTNAME=	${OCTAVE_PKGNAME}-${DISTVERSIONFULL}
 
 MAINTAINER=	stephen@FreeBSD.org
 COMMENT=	Octave-forge package ${OCTAVE_PKGNAME}
 WWW=		https://packages.octave.org/
 
 LICENSE=	GPLv3
 LICENSE_FILE=	${WRKDIR}/${OCTAVE_SRC}/COPYING
 
+BROKEN=		does not build with octave version >= 10.1.0
+
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}lxml>=0:devel/py-lxml@${PY_FLAVOR} \
 		${OCTAVE_TARBALLS_DIR}/matgeom.tar.gz:math/octave-forge-matgeom
 
 USES=		octave python:env
 USE_CXXSTD=	c++14
 
 .include <bsd.port.mk>