diff --git a/math/kfr/Makefile b/math/kfr/Makefile
index 0788cdfa3481..00b2bb6b623b 100644
--- a/math/kfr/Makefile
+++ b/math/kfr/Makefile
@@ -1,28 +1,29 @@
 PORTNAME=	kfr
 DISTVERSION=	4.2.1
 CATEGORIES=	math
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	C++ DSP framework, FFT, Sample Rate Conversion, FIR/IIR/Biquad Filters
 
 LICENSE=	GPLv2
 LICENSE_FILE=	${WRKSRC}/LICENSE.txt
 
 BROKEN_riscv64=	error: no member named 'neon' in 'kfr::cpu_t'
 
 USES=		cmake compiler:c++17-lang
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	kfrlib
 
 CMAKE_ON=	BUILD_SHARED_LIBS
 
-CXXFLAGS_armv6=	-march=native # to fix: ARM builds require NEON support. Add -march=native for native build or skip the check with CMT_FORCE_GENERIC_CPU=1
+#CXXFLAGS_armv6=	-march=native # to fix: ARM builds require NEON support. Add -march=native for native build or skip the check with CMT_FORCE_GENERIC_CPU=1
+CMAKE_ARGS_armv6=	-DCMT_FORCE_GENERIC_CPU=1 # to fix: ARM builds require NEON support. Add -march=native for native build or skip the check with CMT_FORCE_GENERIC_CPU=1
 
 do-test: # some tests fail: https://github.com/kfrlib/kfr/issues/132
 	@cd ${BUILD_WRKSRC} && \
 		${SETENV} ${CONFIGURE_ENV} ${CMAKE_BIN} ${CMAKE_ARGS} -DBUILD_SHARED_LIBS:BOOL=ON ${CMAKE_SOURCE_PATH} && \
 		${SETENV} ${MAKE_ENV} ${MAKE_CMD} ${MAKE_ARGS} ${ALL_TARGET} && \
 		${BUILD_WRKSRC}/bin/all_tests
 
 .include <bsd.port.mk>