diff --git a/math/kamis/Makefile b/math/kamis/Makefile
index 2794cab7f0bc..2185a844f918 100644
--- a/math/kamis/Makefile
+++ b/math/kamis/Makefile
@@ -1,25 +1,34 @@
 PORTNAME=	kamis
 DISTVERSIONPREFIX=	v
 DISTVERSION=	2.0-19
 DISTVERSIONSUFFIX=	-g254fd16
 CATEGORIES=	math
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Maximum independent sets and vertex covers of large sparse graphs
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
+BROKEN_armv6=	fatal error: 'omp.h' file not found
+BROKEN_armv7=	fatal error: 'omp.h' file not found
+
 USES=		cmake
 USE_LDCONFIG=	yes
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	KarlsruheMIS
 GH_PROJECT=	KaMIS
 
 PLIST_FILES=	bin/graphchecker \
 		bin/online_mis \
 		bin/redumis \
 		bin/sort_adjacencies
 
-.include <bsd.port.mk>
+.include <bsd.port.pre.mk>
+
+.if ${OSVERSION} < 1301000
+BROKEN_riscv64=	fatal error: 'omp.h' file not found
+.endif
+
+.include <bsd.port.post.mk>