diff --git a/math/octave-forge-onsas/Makefile b/math/octave-forge-onsas/Makefile
index ad3093dab716..fc8171c52186 100644
--- a/math/octave-forge-onsas/Makefile
+++ b/math/octave-forge-onsas/Makefile
@@ -1,25 +1,27 @@
 PORTNAME=	octave-forge-onsas
 DISTVERSIONPREFIX=	v
 DISTVERSION=	0.2.5
 PORTREVISION=	1
 PORTEPOCH=	1
 CATEGORIES=	math
 
 MAINTAINER=	stephen@FreeBSD.org
 COMMENT=	Octave-forge package ${OCTAVE_PKGNAME}
 WWW=		https://packages.octave.org/
 
 LICENSE=	GPLv3
 LICENSE_FILE=	${WRKDIR}/${OCTAVE_SRC}/COPYING
 
+BROKEN=		this software is incompatible with octave pkg
+
 USES=		octave
 USE_GITHUB=	yes
 GH_ACCOUNT=	ONSAS
 GH_PROJECT=	ONSAS.m
 
 OCTAVE_SRC=		${GH_ACCOUNT}-${DISTVERSION}
 
 NO_ARCH	=	yes
 NO_BUILD=	yes
 
 .include <bsd.port.mk>