diff --git a/drivers/ieee802154/Kconfig.nrf5 b/drivers/ieee802154/Kconfig.nrf5
index 46a730611cd..21a397a928d 100644
--- a/drivers/ieee802154/Kconfig.nrf5
+++ b/drivers/ieee802154/Kconfig.nrf5
@@ -77,7 +77,8 @@ config IEEE802154_NRF5_FCS_IN_LENGTH
 
 config IEEE802154_NRF5_DELAY_TRX_ACC
 	int "Clock accuracy for delayed operations"
-	default CLOCK_CONTROL_NRF_ACCURACY
+	default CLOCK_CONTROL_NRF_ACCURACY if CLOCK_CONTROL_NRF_ACCURACY < 255
+	default 255
 	help
 	  Accuracy of the clock used for scheduling radio delayed operations (delayed transmission
 	  or delayed reception), in ppm.