diff --git a/science/libnegf/Makefile b/science/libnegf/Makefile
index 9359a42592b1..804a1876ea89 100644
--- a/science/libnegf/Makefile
+++ b/science/libnegf/Makefile
@@ -1,33 +1,37 @@
 PORTNAME=	libnegf
 DISTVERSIONPREFIX=	v
 DISTVERSION=	1.1.3
 PORTREVISION=	3
 CATEGORIES=	science # chemistry
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Non Equilibrium Green's Functions library
 WWW=		https://github.com/libnegf/libnegf
 
 LICENSE=	GPLv3
 
+.if !exists(/usr/include/omp.h)
+BROKEN=		requires OpenMP support that is missing on this architecture
+.endif
+
 LIB_DEPENDS=	libmpi.so:net/mpich \
 		libopenblas.so:math/openblas
 
 USES=		cmake:testing fortran python:build
 USE_GITHUB=	yes
 
 CMAKE_ON=	BUILD_SHARED_LIBS
 
 BINARY_ALIAS=	python=${PYTHON_CMD} python3=${PYTHON_CMD}
 
 OPTIONS_DEFINE=		INELASTIC MPI
 OPTIONS_DEFAULT=	MPI # MPI default has to be in sync with science/dftbplus
 
 INELASTIC_DESC=		Build with inelastic scattering
 INELASTIC_CMAKE_BOOL=	WITH_INELASTIC
 INELASTIC_BROKEN=	Error: Can't open included file 'fftw3.f03', see https://github.com/libnegf/libnegf/issues/56
 
 MPI_CMAKE_BOOL=		WITH_MPI
 MPI_LIB_DEPENDS=	libmpifx.so:net/mpifx
 
 .include <bsd.port.mk>