diff --git a/drivers/timer/nrf_rtc_timer.c b/drivers/timer/nrf_rtc_timer.c
index 03398848c8e..ecff65c8c60 100644
--- a/drivers/timer/nrf_rtc_timer.c
+++ b/drivers/timer/nrf_rtc_timer.c
@@ -424,25 +424,18 @@ static void sys_clock_timeout_handler(int32_t chan,
 
 static bool channel_processing_check_and_clear(int32_t chan)
 {
-	bool result = false;
-
-	uint32_t mcu_critical_state = full_int_lock();
-
 	if (nrf_rtc_int_enable_check(RTC, RTC_CHANNEL_INT_MASK(chan))) {
 		/* The processing of channel can be caused by CC match
 		 * or be forced.
 		 */
-		result = (atomic_and(&force_isr_mask, ~BIT(chan)) & BIT(chan)) ||
-			 event_check(chan);
-
-		if (result) {
+		if ((atomic_and(&force_isr_mask, ~BIT(chan)) & BIT(chan)) ||
+		    event_check(chan)) {
 			event_clear(chan);
+			return true;
 		}
 	}
 
-	full_int_unlock(mcu_critical_state);
-
-	return result;
+	return false;
 }
 
 static void process_channel(int32_t chan)