diff --git a/science/spglib/Makefile b/science/spglib/Makefile
index 8b92284b2353..b79425cd2835 100644
--- a/science/spglib/Makefile
+++ b/science/spglib/Makefile
@@ -1,16 +1,20 @@
 PORTNAME=	spglib
 DISTVERSIONPREFIX=	v
 DISTVERSION=	1.16.5
 CATEGORIES=	science
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	C library for finding and handling crystal symmetries
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 USES=		cmake
 USE_GITHUB=	yes
 USE_LDCONFIG=	yes
 
+.if !exists(/usr/include/omp.h)
+CMAKE_ARGS+=	-DUSE_OMP:BOOL=OFF
+.endif
+
 .include <bsd.port.mk>