Index: head/sysutils/bsdfan/Makefile
===================================================================
--- head/sysutils/bsdfan/Makefile	(revision 541448)
+++ head/sysutils/bsdfan/Makefile	(revision 541449)
@@ -1,26 +1,29 @@
 # Created by: Alexey Dokuchaev <danfe@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	bsdfan
 PORTVERSION=	g20180112
 CATEGORIES=	sysutils
 
 MAINTAINER=	danfe@FreeBSD.org
 COMMENT=	Utility to manage fans on Lenovo ThinkPad laptops
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
+ONLY_FOR_ARCHS=	amd64 i386
+ONLY_FOR_ARCHS_REASON=	requires acpi_ibm(4) which is only available on x86
+
 USES=		uidfix
 USE_GITHUB=	yes
 GH_ACCOUNT=	claudiozz
 GH_TAGNAME=	d8428a7
 
 PLIST_FILES=	bin/bsdfan man/man1/bsdfan.1.gz \
 		@sample\ etc/bsdfan.conf.sample
 
 post-install:
 	${INSTALL_DATA} ${WRKSRC}/bsdfan.conf \
 		${STAGEDIR}${PREFIX}/etc/bsdfan.conf.sample
 
 .include <bsd.port.mk>