diff --git a/astro/py-extension-helpers/Makefile b/astro/py-extension-helpers/Makefile
index 43ee4ed2e158..d19ef6b529f7 100644
--- a/astro/py-extension-helpers/Makefile
+++ b/astro/py-extension-helpers/Makefile
@@ -1,16 +1,18 @@
 PORTNAME=	extension-helpers
 DISTVERSION=	0.1
 CATEGORIES=	astro
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	wen@FreeBSD.org
 COMMENT=	Building and installing packages in the Astropy ecosystem
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE.rst
 
 USES=		python:3.6+
 USE_PYTHON=	autoplist distutils
 
+NO_ARCH=	yes
+
 .include <bsd.port.mk>