diff --git a/external/mit/xorg/server/drivers/xf86-video-sis/Makefile b/external/mit/xorg/server/drivers/xf86-video-sis/Makefile
index b9a15cd1ab77..d667fb1fff78 100644
--- a/external/mit/xorg/server/drivers/xf86-video-sis/Makefile
+++ b/external/mit/xorg/server/drivers/xf86-video-sis/Makefile
@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile,v 1.5 2008/10/14 23:37:19 cube Exp $
+#	$NetBSD: Makefile,v 1.6 2009/06/10 02:01:14 mrg Exp $
 
 DRIVER=		xf86-video-sis
 DRIVER_NAME=	sis_drv
@@ -11,6 +11,7 @@ SRCS+=		sis_vga.c sis_video.c
 MAN=		sis.4
 
 CPPFLAGS+=	-DHAVE_CONFIG_H -I${X11SRCDIR.${DRIVER}}/../include
+CPPFLAGS+=	-I${X11SRCDIR.${DRIVER}}/src
 CPPFLAGS+=	-I${DESTDIR}${X11INCDIR}/X11
 CPPFLAGS+=	-I${DESTDIR}${X11INCDIR}/X11/dri
 CPPFLAGS+=	-I${DESTDIR}${X11INCDIR}/X11/drm