--- debug.c.orig	2004-06-26 04:21:23.881871000 +0000
+++ debug.c	2004-06-26 04:21:36.941871000 +0000
@@ -52,7 +52,7 @@
 #define UNLOCK    outb(0x370, 0x87); outb(0x370, 0x87);
 #define LOCK      outb(0x370, 0xAA);
 
-extern int errno;
+#include <errno.h>
 
 int tmpSuperIO;