--- hal-0.5.11~rc2/hald/linux/addons/addon-macbook-backlight.c	2008-03-17 17:25:12.000000000 -0400
+++ hal-working/hald/linux/addons/addon-macbook-backlight.c	2008-04-22 19:42:10.908714418 -0400
@@ -115,7 +115,7 @@
 static gboolean
 map_register_page (void)
 {
-	long address;
+	unsigned long address;
 	int fd;
 
 	address = determine_video_base_address ();