diff --git a/math/spfft/Makefile b/math/spfft/Makefile
index 7bad4ac283f6..53c508210a18 100644
--- a/math/spfft/Makefile
+++ b/math/spfft/Makefile
@@ -1,59 +1,63 @@
 PORTNAME=	spfft
 DISTVERSIONPREFIX=	v
 DISTVERSION=	1.1.0
 CATEGORIES=	math
 
 PATCH_SITES=	https://github.com/${GH_ACCOUNT}/${GH_PROJECT}/commit/
 PATCHFILES=	c91e7ec9f420d477a8144dee2bc36cd8dde434c4.patch:-p1 # https://github.com/eth-cscs/SpFFT/pull/57
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Sparse 3D FFT library
 WWW=		https://github.com/eth-cscs/SpFFT
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 LIB_DEPENDS=	libfftw3.so:math/fftw3
 TEST_DEPENDS=	cli11>0:devel/cli11 \
 		googletest>0:devel/googletest \
 		nlohmann-json>0:devel/nlohmann-json
 
 USES=		cmake:testing compiler:c++11-lang
 USE_LDCONFIG=	yes
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	eth-cscs
 GH_PROJECT=	SpFFT
 
 CMAKE_TESTING_ON=	SPFFT_BUILD_TESTS
 CMAKE_TESTING_ARGS=	-DSPFFT_BUNDLED_CLI11=OFF \
 			-DSPFFT_BUNDLED_GOOGLETEST=OFF \
 			-DSPFFT_BUNDLED_JSON=OFF
 CMAKE_TESTING_TARGET=	${ALL_TARGET}
 
 OPTIONS_DEFINE=		FORTRAN OPENMP
 OPTIONS_SINGLE=		MPI
 OPTIONS_SINGLE_MPI=	NOMPI MPICH OPENMPI
-OPTIONS_DEFAULT=	FORTRAN MPICH OPENMP
+OPTIONS_DEFAULT=	FORTRAN MPICH
 OPTIONS_SUB=		yes
 
 FORTRAN_USES=		fortran
 FORTRAN_CMAKE_BOOL=	SPFFT_FORTRAN
 
 NOMPI_DESC=		Build without parallel processing support
 NOMPI_CMAKE_ON=		-DSPFFT_MPI=OFF
 
 MPICH_USES=		mpi:mpich
 MPICH_CMAKE_ON=		-DSPFFT_MPI=ON
 
 OPENMPI_USES=		mpi:openmpi
 OPENMPI_CMAKE_ON=	-DSPFFT_MPI=ON
 
 OPENMP_CMAKE_BOOL=	SPFFT_OMP
 
+.if exists(/usr/include/omp.h)
+OPTIONS_DEFAULT+=	OPENMP
+.endif
+
 post-test:
 	@cd ${BUILD_WRKSRC}/tests && \
 		./run_local_tests && \
 		./run_mpi_tests
 
 .include <bsd.port.mk>