diff --git a/cpu/msp430/rtimer-arch.h b/cpu/msp430/rtimer-arch.h
index 0a19ddf03..1b3aac83c 100644
--- a/cpu/msp430/rtimer-arch.h
+++ b/cpu/msp430/rtimer-arch.h
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: rtimer-arch.h,v 1.2 2007/04/03 19:04:27 adamdunkels Exp $
+ * $Id: rtimer-arch.h,v 1.3 2007/05/22 21:00:09 adamdunkels Exp $
  */
 
 /**
@@ -41,6 +41,13 @@
 #ifndef __RTIMER_ARCH_H__
 #define __RTIMER_ARCH_H__
 
+#include <io.h>
+#include "sys/rtimer.h"
+
 #define RTIMER_ARCH_SECOND 4096
 
+void rtimer_arch_set(rtimer_clock_t t);
+
+#define rtimer_arch_now() (TBR)
+
 #endif /* __RTIMER_ARCH_H__ */