diff --git a/cpu/msp430/rtimer-arch.c b/cpu/msp430/rtimer-arch.c
index 774c27692..1101f59a5 100644
--- a/cpu/msp430/rtimer-arch.c
+++ b/cpu/msp430/rtimer-arch.c
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: rtimer-arch.c,v 1.9 2009/10/06 09:21:46 fros4943 Exp $
+ * $Id: rtimer-arch.c,v 1.10 2009/12/07 14:32:16 adamdunkels Exp $
  */
 
 /**
@@ -55,7 +55,9 @@
 
 /*---------------------------------------------------------------------------*/
 interrupt(TIMERA0_VECTOR) timera0 (void) {
+  int taiv;
   ENERGEST_ON(ENERGEST_TYPE_IRQ);
+  taiv = TAIV;
   rtimer_run_next();
   if(process_nevents() > 0) {
     LPM4_EXIT;