diff --git a/math/pffft/Makefile b/math/pffft/Makefile
index 2835b89796ef..315f319f8487 100644
--- a/math/pffft/Makefile
+++ b/math/pffft/Makefile
@@ -1,31 +1,32 @@
 PORTNAME=	pffft
 PORTVERSION=	g20210806
 CATEGORIES=	math
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Pretty Fast FFT (PFFFT) library
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE.txt
 
 USES=		cmake
 USE_LDCONFIG=	yes
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	marton78
 GH_TAGNAME=	9603871
 
 CMAKE_ON=	BUILD_SHARED_LIBS INSTALL_PFDSP INSTALL_PFFASTCONV
 
 .include <bsd.port.pre.mk>
 
 .if ${ARCH} == i386
+CFLAGS+=	-msse2
 CXXFLAGS+=	-msse2 # fixes error: always_inline function '_mm_unpacklo_ps' requires target feature 'sse', but would be inlined into function 'pffft_zreorder' that is compiled without support for 'sse'
 .endif
 
 post-install: # move headers into a dedicated directory
 	cd ${STAGEDIR}${PREFIX} && \
 		${MKDIR} include/${PORTNAME} && \
 		${MV} include/*.h include/*.hpp include/${PORTNAME}
 
 .include <bsd.port.post.mk>