diff --git a/cpu/cc2430/dev/clock.c b/cpu/cc2430/dev/clock.c
index 619db2f93..8ca969056 100644
--- a/cpu/cc2430/dev/clock.c
+++ b/cpu/cc2430/dev/clock.c
@@ -46,7 +46,7 @@
 #define TICK_VAL (32768/128)  /* 256 */
 /*---------------------------------------------------------------------------*/
 #if CLOCK_CONF_STACK_FRIENDLY
-volatile __bit sleep_flag;
+volatile uint8_t sleep_flag;
 #endif
 /*---------------------------------------------------------------------------*/
 /* Used in sleep timer interrupt for calculating the next interrupt time */
diff --git a/platform/sensinode/contiki-sensinode-main.c b/platform/sensinode/contiki-sensinode-main.c
index d059c24f2..97f0fb359 100644
--- a/platform/sensinode/contiki-sensinode-main.c
+++ b/platform/sensinode/contiki-sensinode-main.c
@@ -55,7 +55,7 @@ static __data int len;
 #endif
 
 #if CLOCK_CONF_STACK_FRIENDLY
-extern volatile __bit sleep_flag;
+extern volatile uint8_t sleep_flag;
 #endif
 
 extern rimeaddr_t rimeaddr_node_addr;