diff --git a/cpu/msp430/clock.c b/cpu/msp430/clock.c
index c8781a7ce..1f5c79eb5 100644
--- a/cpu/msp430/clock.c
+++ b/cpu/msp430/clock.c
@@ -28,7 +28,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * @(#)$Id: clock.c,v 1.20 2010/01/18 21:17:11 adamdunkels Exp $
+ * @(#)$Id: clock.c,v 1.21 2010/01/30 14:03:35 adamdunkels Exp $
  */
 
 
@@ -63,9 +63,7 @@ interrupt(TIMERA1_VECTOR) timera1 (void) {
 
     /* Make sure interrupt time is future */
     do {
-      TACTL &= ~MC1;
       TACCR1 += INTERVAL;
-      TACTL |= MC1;
       ++count;
 
       /* Make sure the CLOCK_CONF_SECOND is a power of two, to ensure
diff --git a/cpu/msp430/rtimer-arch.c b/cpu/msp430/rtimer-arch.c
index 3d4aeacc7..e13b515c0 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 1.12 2010/01/18 21:17:11 adamdunkels Exp $
+ * $Id: rtimer-arch.c,v 1.13 2010/01/30 14:03:35 adamdunkels Exp $
  */
 
 /**
@@ -82,7 +82,6 @@ rtimer_arch_schedule(rtimer_clock_t t)
 {
   PRINTF("rtimer_arch_schedule time %u\n", t);
 
-  TACTL &= ~MC1;
   TACCR0 = t;
-  TACTL |= MC1;
 }
+/*---------------------------------------------------------------------------*/