diff --git a/math/cosma/Makefile b/math/cosma/Makefile
index 2466996c868d..dea671256fb1 100644
--- a/math/cosma/Makefile
+++ b/math/cosma/Makefile
@@ -1,37 +1,41 @@
 PORTNAME=	cosma
 DISTVERSIONPREFIX=	v
 DISTVERSION=	2.6.1
 CATEGORIES=	math
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Distributed communication-optimal matrix multiplication algorithm
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
+.if !exists(/usr/include/omp.h)
+BROKEN=		requires OpenMP support that is missing on this architecture
+.endif
+
 BUILD_DEPENDS=	openmpi>0:net/openmpi
 LIB_DEPENDS=	libopenblas.so:math/openblas
 RUN_DEPENDS=	openmpi>0:net/openmpi
 
 USES=		cmake:testing
 USE_LDCONFIG=	yes
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	eth-cscs
 GH_PROJECT=	COSMA
 GH_TUPLE=	eth-cscs:COSTA:e48f571:costa/libs/COSTA \
 		eth-cscs:Tiled-MM:9e880f9:tiledmm/libs/Tiled-MM
 
 CMAKE_ON=	BUILD_SHARED_LIBS
 CMAKE_OFF=	COSMA_WITH_TESTS
 CMAKE_ARGS=	-DCOSMA_BLAS="OPENBLAS"
 CMAKE_TESTING_ON=	COSMA_WITH_TESTS
 
 post-install:
 	@cd ${STAGEDIR}${PREFIX} && \
 		${RMDIR} \
 			include/costa/pxtran \
 			include/costa/pxtranc \
 			include/costa/pxtranu
 
 .include <bsd.port.mk>