diff --git a/devel/zfp/Makefile b/devel/zfp/Makefile
index 6f3cfd774349..1538cfd2a7bd 100644
--- a/devel/zfp/Makefile
+++ b/devel/zfp/Makefile
@@ -1,18 +1,22 @@
 PORTNAME=	zfp
 DISTVERSION=	1.0.0
 CATEGORIES=	devel science
 MASTER_SITES=	https://github.com/LLNL/${PORTNAME}/releases/download/${DISTVERSION}/
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	High throughput library for compressed floating-point arrays
 WWW=		https://computing.llnl.gov/projects/zfp
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 USES=		cmake:testing
 USE_LDCONFIG=	yes
 
+.if !exists(/usr/include/omp.h)
+CMAKE_OFF=	ZFP_WITH_OPENMP
+.endif
+
 LDFLAGS+=	-lm
 
 .include <bsd.port.mk>