diff --git a/math/spfft/Makefile b/math/spfft/Makefile
index 7bad4ac283f6..53c508210a18 100644
--- a/math/spfft/Makefile
+++ b/math/spfft/Makefile
@@ -34,7 +34,7 @@ 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
@@ -51,6 +51,10 @@ 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 && \