diff --git a/math/openblas/Makefile b/math/openblas/Makefile
index 538a515b5674..ce113c4a9c4c 100644
--- a/math/openblas/Makefile
+++ b/math/openblas/Makefile
@@ -4,6 +4,7 @@
 PORTNAME=	openblas
 DISTVERSIONPREFIX=	v
 DISTVERSION=	0.3.9
+PORTREVISION=	1
 PORTEPOCH=	1
 CATEGORIES=	math
 MASTER_SITES=	NL/lapack/timing/:lapack_tmg
@@ -36,6 +37,7 @@ TEST_TARGET=	tests
 PLIST_SUB+=	PORTVERSION=${PORTVERSION}
 
 OPTIONS_DEFINE=			DYNAMIC_ARCH INTERFACE64 OPENMP
+OPTIONS_DEFAULT=		OPENMP
 OPTIONS_DEFINE_i386=		AVX AVX2
 OPTIONS_DEFINE_amd64=		AVX AVX2
 OPTIONS_DEFINE_powerpc64=	POWER6