diff --git a/math/octave-forge-tisean/Makefile b/math/octave-forge-tisean/Makefile
index cd68acc029d9..af458e95d348 100644
--- a/math/octave-forge-tisean/Makefile
+++ b/math/octave-forge-tisean/Makefile
@@ -1,30 +1,36 @@
 # Created by: Stephen Montgomery-Smith <stephen@math.missouri.edu>
 # $FreeBSD$
 
 PORTNAME=	octave-forge-tisean
 PORTVERSION=	0.2.3
 CATEGORIES=	math
 
 MAINTAINER=	stephen@FreeBSD.org
 COMMENT=	Octave-forge package ${OCTAVE_PKGNAME}
 
 LICENSE=	GPLv3
 LICENSE_FILE=	${WRKDIR}/${OCTSRC}/COPYING
 
 RUN_DEPENDS+=	${TARBALLS_DIR}/signal.tar.gz:${PORTSDIR}/math/octave-forge-signal
 
 # OCTSRC is the name of the directory of the package.
 # It is usually ${OCTAVE_PKGNAME} or ${DISTNAME}.
 OCTSRC=		${DISTNAME}
 
 WRKSRC=		${WRKDIR}/${OCTSRC}/src
 
 GNU_CONFIGURE=	yes
 
 .include "${.CURDIR}/../../Mk/bsd.octave.mk"
 
 post-build:
 	${RM} -f ${WRKSRC}/Makefile ${WRKSRC}/configure
 	cd ${WRKDIR} && ${TAR} cfz ${DISTNAME}.tar.gz ${OCTSRC}
 
-.include <bsd.port.mk>
+.include <bsd.port.pre.mk>
+
+.if ${OSVERSION} < 1000000
+BROKEN=		Doesn't build on FreeBSD 9 or older
+.endif
+
+.include <bsd.port.post.mk>