diff --git a/drivers/timer/Kconfig.nrf_rtc b/drivers/timer/Kconfig.nrf_rtc
index d9df59049bf..fe6f2ffd97a 100644
--- a/drivers/timer/Kconfig.nrf_rtc
+++ b/drivers/timer/Kconfig.nrf_rtc
@@ -18,7 +18,7 @@ if NRF_RTC_TIMER
 
 config NRF_RTC_TIMER_USER_CHAN_COUNT
 	int "Additional channels that can be used"
-	default 2 if NRF_802154_RADIO_DRIVER
+	default 3 if NRF_802154_RADIO_DRIVER
 	default 0
 	help
 	  Use nrf_rtc_timer.h API. Driver is not managing allocation of channels.
diff --git a/soc/arm/nordic_nrf/nrf53/Kconfig.soc b/soc/arm/nordic_nrf/nrf53/Kconfig.soc
index 68c2ec0928e..a27f807ee2e 100644
--- a/soc/arm/nordic_nrf/nrf53/Kconfig.soc
+++ b/soc/arm/nordic_nrf/nrf53/Kconfig.soc
@@ -148,6 +148,7 @@ config NRF53_SYNC_RTC_INIT_PRIORITY
 	  nRF53 Synchronized RTC initialization priority.
 
 config NRF_RTC_TIMER_USER_CHAN_COUNT
+	default 3 if NRF_802154_RADIO_DRIVER
 	default 1
 
 config NRF53_SYNC_RTC_LOG_TIMESTAMP