diff --git a/cpu/mc1322x/contiki-maca.c b/cpu/mc1322x/contiki-maca.c
index 8a2a12ee2..5b56ac22b 100644
--- a/cpu/mc1322x/contiki-maca.c
+++ b/cpu/mc1322x/contiki-maca.c
@@ -247,7 +247,7 @@ PROCESS_THREAD(contiki_maca_process, ev, data)
  	PROCESS_BEGIN();
 
 	while (1) {
-		PROCESS_PAUSE();
+		PROCESS_YIELD();
 
 		/* check if there is a request to turn the radio on or off */
 		if(contiki_maca_request_on == 1) {
@@ -274,6 +274,11 @@ PROCESS_THREAD(contiki_maca_process, ev, data)
  	PROCESS_END();
 }
 
+void maca_rx_callback(volatile packet_t *p __attribute((unused))) {
+	process_poll(&contiki_maca_process);
+}
+
+
 #if BLOCKING_TX
 void maca_tx_callback(volatile packet_t *p __attribute((unused))) {
 	tx_complete = 1;