--- a/master/ethernet.h	Fri Nov 26 11:23:19 2010 +0100
+++ b/master/ethernet.h	Sat Nov 27 17:02:54 2010 +0100
@@ -39,6 +39,7 @@
 
 #include <linux/list.h>
 #include <linux/netdevice.h>
+#include <linux/semaphore.h>
 
 #include "globals.h"
 #include "slave.h"