diff --git a/math/openblas64/Makefile b/math/openblas64/Makefile
index 2925783a01a2..1a4972b0fe55 100644
--- a/math/openblas64/Makefile
+++ b/math/openblas64/Makefile
@@ -1,79 +1,78 @@
 PORTNAME=	openblas
 DISTVERSIONPREFIX=	v
 DISTVERSION=	0.3.27
 CATEGORIES=	math
 MASTER_SITES=	NL/lapack/timing/:lapack_tmg
 PKGNAMESUFFIX=	64
 DISTFILES=	large.tgz:lapack_tmg \
 		timing.tgz:lapack_tmg
 DIST_SUBDIR=	openblas
 
 MAINTAINER=	thierry@FreeBSD.org
 COMMENT=	OpenBLAS with 8 byte integers on 64-bits architectures
 WWW=		https://github.com/OpenMathLib/OpenBLAS
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 NOT_FOR_ARCHS=	armv6 armv7 i386 powerpc
 NOT_FOR_ARCHS_REASON=	Only for 64-bits architectures
 
 USES=		cmake:testing compiler:c11 cpe fortran gmake pathfix pkgconfig
 CMAKE_ARGS=	-DINTERFACE64:BOOL=on	\
 		-DSUFFIX64_UNDERSCORE:STRING=64	\
 		-DSYMBOLSUFFIX:STRING=_64	\
 		-DBUILD_SHARED_LIBS:BOOL=on	\
 		-DBUILD_STATIC_LIBS:BOOL=on	\
 		-DUSE_THREAD:BOOL=on
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	OpenMathLib
 GH_PROJECT=	OpenBLAS
 LARGE_FILE=	large.tgz
 TIMING_FILE=	timing.tgz
 CPE_VENDOR=	openblas_project
 
 USE_LDCONFIG=	yes
 
 PLIST_SUB+=	PORTVERSION=${PORTVERSION}
 
 OPTIONS_DEFINE=			BENCHMARKS DYNAMIC_ARCH OPENMP
 OPTIONS_DEFAULT=		OPENMP
 OPTIONS_EXCLUDE_powerpc64le=	OPENMP
 OPTIONS_EXCLUDE_powerpc64=	OPENMP
 OPTIONS_SUB=	yes
 
 .if defined(BATCH) || defined(PACKAGE_BUILDING)
 OPTIONS_DEFAULT_amd64=	DYNAMIC_ARCH
 OPTIONS_DEFAULT_powerpc64le=	DYNAMIC_ARCH
 .endif
 
 BENCHMARKS_DESC=	Build the collection of BLAS/LAPACK benchmarks
 DYNAMIC_ARCH_DESC=	Optimize for multiple CPU types, otherwise for this CPU
 
 BENCHMARKS_CMAKE_BOOL=	BUILD_BENCHMARKS
 DYNAMIC_ARCH_CMAKE_BOOL=DYNAMIC_ARCH DYNAMIC_OLDER
 OPENMP_CMAKE_BOOL=	USE_OPENMP
 OPENMP_LDFLAGS=		-lomp
 
 .include <bsd.port.options.mk>
 
 .if ${ARCH} == powerpc64
 USE_GCC=		yes
 .endif
 
 .if ${ARCH} == powerpc64le
-CFLAGS+=		-lm
 USE_GCC=		yes
 .endif
 
 post-extract:
 	cd ${DISTDIR}/${DIST_SUBDIR} ; \
 	${CP} ${LARGE_FILE} ${TIMING_FILE} ${WRKSRC}
 
 pre-configure-OPENMP-on:
 	${REINPLACE_CMD} -e "s+OPENBLAS_NUM_THREADS+OMP_NUM_THREADS+g" \
 		${WRKSRC}/test/Makefile \
 		${WRKSRC}/ctest/Makefile
 
 .include <bsd.port.mk>
diff --git a/math/openblas64/files/patch-param.h b/math/openblas64/files/patch-param.h
new file mode 100644
index 000000000000..0362153e41f1
--- /dev/null
+++ b/math/openblas64/files/patch-param.h
@@ -0,0 +1,11 @@
+--- param.h.orig	2024-06-23 08:32:52 UTC
++++ param.h
+@@ -2553,7 +2553,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILI
+ 
+ #endif
+ 
+-#if defined(POWER9) && defined(OS_LINUX)
++#if defined(POWER9) && (defined(OS_LINUX) || defined(OS_FREEBSD))
+ 
+ #define SNUMOPT		16
+ #define DNUMOPT		8