--- a/master/ethernet.h	Mon Oct 25 16:30:45 2010 +0200
+++ b/master/ethernet.h	Mon Oct 25 16:33:41 2010 +0200
@@ -39,6 +39,7 @@
 
 #include <linux/list.h>
 #include <linux/netdevice.h>
+#include <linux/semaphore.h>
 
 #include "globals.h"
 #include "slave.h"