diff --git a/boards/native/nrf_bsim/nrf54l15bsim_nrf54l15_cpuapp.dts b/boards/native/nrf_bsim/nrf54l15bsim_nrf54l15_cpuapp.dts
index 532e0117014..b32e8534abc 100644
--- a/boards/native/nrf_bsim/nrf54l15bsim_nrf54l15_cpuapp.dts
+++ b/boards/native/nrf_bsim/nrf54l15bsim_nrf54l15_cpuapp.dts
@@ -55,7 +55,7 @@
 
 	rng: rng {
 		status = "okay";
-		compatible = "zephyr,native-posix-rng";
+		compatible = "nordic,nrf-cracen-ctrdrbg";
 	};
 
 	psa_rng: psa-rng {
diff --git a/subsys/bluetooth/controller/Kconfig.ll_sw_split b/subsys/bluetooth/controller/Kconfig.ll_sw_split
index b4572c05d3b..0e364c3894b 100644
--- a/subsys/bluetooth/controller/Kconfig.ll_sw_split
+++ b/subsys/bluetooth/controller/Kconfig.ll_sw_split
@@ -12,10 +12,10 @@ config BT_LLL_VENDOR_NORDIC
 	depends on !$(dt_nodelabel_enabled,rtc0)
 
 	select BT_CTLR_ENTROPY_SUPPORT if !SOC_COMPATIBLE_NRF54LX || BOARD_NRF54L15BSIM
-	select FAKE_ENTROPY_NATIVE_POSIX if BT_CTLR_ENTROPY && BOARD_NRF54L15BSIM
+	select ENTROPY_NRF_CRACEN_CTR_DRBG if BT_CTLR_ENTROPY && BOARD_NRF54L15BSIM
 	select ENTROPY_NRF5_RNG if BT_CTLR_ENTROPY && !SOC_COMPATIBLE_NRF54LX
 	select ENTROPY_NRF5_BIAS_CORRECTION if ENTROPY_NRF5_RNG
-	select EXPERIMENTAL if !ENTROPY_HAS_DRIVER || FAKE_ENTROPY_NATIVE_POSIX
+	select EXPERIMENTAL if !ENTROPY_HAS_DRIVER
 
 	select BT_HAS_HCI_VS
 	select BT_CTLR_CRYPTO_SUPPORT