Index: head/x11-drivers/xf86-video-siliconmotion/Makefile
===================================================================
--- head/x11-drivers/xf86-video-siliconmotion/Makefile	(revision 426152)
+++ head/x11-drivers/xf86-video-siliconmotion/Makefile	(revision 426153)
@@ -1,12 +1,14 @@
 # $FreeBSD$
 
 PORTNAME=	xf86-video-siliconmotion
 PORTVERSION=	1.7.8
 CATEGORIES=	x11-drivers
 
 MAINTAINER=	x11@FreeBSD.org
 COMMENT=	X.Org siliconmotion display driver
 
 XORG_CAT=	driver
 
+ONLY_FOR_ARCHS=		amd64 i386
+
 .include <bsd.port.mk>
Index: head/x11-drivers/xf86-video-tseng/Makefile
===================================================================
--- head/x11-drivers/xf86-video-tseng/Makefile	(revision 426152)
+++ head/x11-drivers/xf86-video-tseng/Makefile	(revision 426153)
@@ -1,13 +1,15 @@
 # $FreeBSD$
 
 PORTNAME=	xf86-video-tseng
 PORTVERSION=	1.2.5
 PORTREVISION=	7
 CATEGORIES=	x11-drivers
 
 MAINTAINER=	x11@FreeBSD.org
 COMMENT=	X.Org tseng display driver
 
 XORG_CAT=	driver
 
+ONLY_FOR_ARCHS=		amd64 i386
+
 .include <bsd.port.mk>