diff --git a/atusb/fw/include/atusb/ep0.h b/atusb/fw/include/atusb/ep0.h
index cb6acd1..382aa92 100644
--- a/atusb/fw/include/atusb/ep0.h
+++ b/atusb/fw/include/atusb/ep0.h
@@ -1,8 +1,8 @@
 /*
  * include/atusb/ep0.h - EP0 extension protocol
  *
- * Written 2008-2010 by Werner Almesberger
- * Copyright 2008-2010 Werner Almesberger
+ * Written 2008-2011 by Werner Almesberger
+ * Copyright 2008-2011 Werner Almesberger
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -45,6 +45,7 @@
 
 #define	HW_TYPE_100813	0	/* 2010-08-13 */
 #define	HW_TYPE_101216	1	/* 2010-12-16 */
+#define	HW_TYPE_110131	2	/* 2011-01-31, ATmega32U2-based */
 
 
 /*
diff --git a/atusb/fw2/atusb.c b/atusb/fw2/atusb.c
index a674b2b..9a5114e 100644
--- a/atusb/fw2/atusb.c
+++ b/atusb/fw2/atusb.c
@@ -10,9 +10,7 @@
 #include "at86rf230.h"
 #include "board.h"
 #include "spi.h"
-
-
-void ep0_init(void);
+#include "atusb/ep0.h"
 
 
 int main(void)
diff --git a/atusb/fw2/ep0.c b/atusb/fw2/ep0.c
index e1c7cb9..0def11a 100644
--- a/atusb/fw2/ep0.c
+++ b/atusb/fw2/ep0.c
@@ -31,7 +31,7 @@
 #include "spi.h"
 
 
-#define	HW_TYPE		2	/* @@@ needs more work */
+#define	HW_TYPE		HW_TYPE_110131
 static const char *build_date = "today";
 static unsigned build_number = 42;