diff --git a/math/octave-forge-llms/Makefile b/math/octave-forge-llms/Makefile
index c226ac36185e..489210f2eff5 100644
--- a/math/octave-forge-llms/Makefile
+++ b/math/octave-forge-llms/Makefile
@@ -1,26 +1,27 @@
 PORTNAME=	octave-forge-llms
 DISTVERSIONPREFIX=	release-
 DISTVERSION=	0.1.3
 CATEGORIES=	math
 
 MAINTAINER=	stephen@FreeBSD.org
 COMMENT=	Octave-forge package ${OCTAVE_PKGNAME}
 WWW=		https://packages.octave.org/
 
 LICENSE=	GPLv3
 LICENSE_FILE=	${WRKDIR}/${OCTAVE_SRC}/COPYING
 
 RUN_DEPENDS+=	${OCTAVE_TARBALLS_DIR}/datatypes.tar.gz:math/octave-forge-datatypes
 
 USES=		octave
 USE_GITHUB=	yes
 GH_ACCOUNT=	pr0m1th3as
 GH_PROJECT=	octave-llms
 
-CXXFLAGS+=	-mpclmul -msse4.1
+CXXFLAGS_amd64=	-mpclmul -msse4.1
+CXXFLAGS_i386=	-mpclmul -msse4.1
 
 IGNORE_arm64=	does not build
 
 OCTAVE_SRC=	${GH_PROJECT}-release-${DISTVERSION}
 
 .include <bsd.port.mk>