diff --git a/math/clad/Makefile b/math/clad/Makefile
index c3b541390e63..018a2b30221d 100644
--- a/math/clad/Makefile
+++ b/math/clad/Makefile
@@ -1,41 +1,45 @@
 PORTNAME=	clad
 DISTVERSIONPREFIX=	v
 DISTVERSION=	1.8
 CATEGORIES=	math
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Automatic differentiation for C/C++
 WWW=		https://github.com/vgvassilev/clad
 
 LICENSE=	LGPL3
 LICENSE_FILE=	${WRKSRC}/License.txt
 
+.if !exists(/usr/include/omp.h)
+BROKEN=		requires OpenMP support that is missing on this architecture
+.endif
+
 TEST_DEPENDS=	kokkos>0:devel/kokkos
 
 USES=		cmake:testing llvm:16,build,run localbase
 USE_LDCONFIG=	yes
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	vgvassilev
 
 CMAKE_ARGS=	-DClang_DIR=${LLVM_PREFIX}/lib/cmake/clang \
 		-DLLVM_DIR=${LLVM_PREFIX}/lib/cmake/llvm \
 		-DLLVM_EXTERNAL_LIT=${LLVM_PREFIX}/bin/llvm-lit
 CMAKE_ON=	BUILD_SHARED_LIBS
 CMAKE_TESTING_ON=	FREEBSD_BUILD_TESTS FREEBSD_BUILD_DEMOS
 CMAKE_TESTING_TARGET=	check-clad
 
 #CXXFLAGS+=	-D_OPENMP
 CXXFLAGS+=	-fopenmp
 
 post-patch:
 	@${REINPLACE_CMD} \
 		-e ' \
 			s|import lit|&${LLVM_VERSION}|; \
 			s|lit\.|lit${LLVM_VERSION}.| \
 		' \
 		${WRKSRC}/test/lit.cfg
 
 # tests fail to compile: https://github.com/vgvassilev/clad/issues/993, https://github.com/vgvassilev/clad/issues/1181
 
 .include <bsd.port.mk>