diff --git a/misc/py-xformers/Makefile b/misc/py-xformers/Makefile
index 92f8e65f2ddf..ede333821bd2 100644
--- a/misc/py-xformers/Makefile
+++ b/misc/py-xformers/Makefile
@@ -1,34 +1,34 @@
 PORTNAME=	xformers
 DISTVERSION=	0.0.35
 CATEGORIES=	misc python # machine-learning
 MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Transformers building blocks, supporting a composable construction
 WWW=		https://facebookresearch.github.io/xformers/ \
 		https://github.com/facebookresearch/xformers
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 BUILD_DEPENDS=	pybind11>0:devel/pybind11 \
 		${PYTHON_PKGNAMEPREFIX}pytorch>=2.10:misc/py-pytorch@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}setuptools>0:devel/py-setuptools@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}wheel>=0:devel/py-wheel@${PY_FLAVOR}
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}pytorch>=2.10:misc/py-pytorch@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}numpy>0:math/py-numpy@${PY_FLAVOR}
 
 USES=		compiler:c++17-lang localbase python
 USE_PYTHON=	pep517 autoplist pytest # tests fail, see https://github.com/facebookresearch/xformers/issues/1003
 
 .include <bsd.port.pre.mk>
 
-.if ${ARCH} == "amd64"
+.if ${ARCH} == "aarch64"
 MAKE_ENV=	LD_STATIC_TLS_EXTRA=4096 # see pkg-message in misc/py-pytorch
 .endif
 
 post-install:
 	@${STRIP_CMD} ${STAGEDIR}${PYTHONPREFIX_SITELIBDIR}/xformers/_C.so
 
 .include <bsd.port.post.mk>