diff --git a/math/kamis/Makefile b/math/kamis/Makefile
index 3e12d34d0b9a..d33923150cca 100644
--- a/math/kamis/Makefile
+++ b/math/kamis/Makefile
@@ -1,31 +1,31 @@
 PORTNAME=	kamis
 DISTVERSIONPREFIX=	v
 DISTVERSION=	2.1
 CATEGORIES=	math
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Maximum independent sets and vertex covers of large sparse graphs
 WWW=		https://karlsruhemis.github.io/
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 #BROKEN_armv7=	gcc13 fails: error: use of built-in trait '__remove_cvref(_InIter1)' in function signature, see https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=278630
 
 USES=		cmake
 USE_LDCONFIG=	yes
 
-#.if !exists(/usr/include/omp.h)
-#USES+=		compiler:gcc-c++11-lib
-#.endif
+.if !exists(/usr/include/omp.h)
+BROKEN=		requires OpenMP support that is missing on this architecture
+.endif
 
 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>