diff --git a/samples/bluetooth/central_uart/boards/nrf5340dk_nrf5340_cpuapp.conf b/samples/bluetooth/central_uart/boards/nrf5340dk_nrf5340_cpuapp.conf
new file mode 100644
index 000000000000..6003d59cdd82
--- /dev/null
+++ b/samples/bluetooth/central_uart/boards/nrf5340dk_nrf5340_cpuapp.conf
@@ -0,0 +1,11 @@
+#
+# Copyright (c) 2025 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+################################################################################
+
+# Don't get entropy from HCI on nRF5340 devices
+CONFIG_BT_HOST_CRYPTO_PRNG=y
+CONFIG_ENTROPY_BT_HCI=n
+
diff --git a/samples/bluetooth/central_uart/boards/nrf54h20dk_nrf54h20_cpuapp.conf b/samples/bluetooth/central_uart/boards/nrf54h20dk_nrf54h20_cpuapp.conf
index f75b773c2b75..fb5a71c62404 100644
--- a/samples/bluetooth/central_uart/boards/nrf54h20dk_nrf54h20_cpuapp.conf
+++ b/samples/bluetooth/central_uart/boards/nrf54h20dk_nrf54h20_cpuapp.conf
@@ -6,3 +6,7 @@
 
 # Disable the unsupported driver
 CONFIG_NRFX_UARTE0=n
+
+# Don't get entropy from HCI on nRF54H20 devices
+CONFIG_BT_HOST_CRYPTO_PRNG=y
+CONFIG_ENTROPY_BT_HCI=n
diff --git a/samples/bluetooth/peripheral_uart/boards/nrf5340dk_nrf5340_cpuapp.conf b/samples/bluetooth/peripheral_uart/boards/nrf5340dk_nrf5340_cpuapp.conf
new file mode 100644
index 000000000000..8a8f0f7fb85c
--- /dev/null
+++ b/samples/bluetooth/peripheral_uart/boards/nrf5340dk_nrf5340_cpuapp.conf
@@ -0,0 +1,9 @@
+#
+# Copyright (c) 2025 Nordic Semiconductor
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+# Don't get entropy from HCI on nRF5340 devices
+CONFIG_BT_HOST_CRYPTO_PRNG=y
+CONFIG_ENTROPY_BT_HCI=n
diff --git a/samples/bluetooth/peripheral_uart/boards/nrf54h20dk_nrf54h20_cpuapp.conf b/samples/bluetooth/peripheral_uart/boards/nrf54h20dk_nrf54h20_cpuapp.conf
index 0623953b424b..ec5f8e3fbb40 100644
--- a/samples/bluetooth/peripheral_uart/boards/nrf54h20dk_nrf54h20_cpuapp.conf
+++ b/samples/bluetooth/peripheral_uart/boards/nrf54h20dk_nrf54h20_cpuapp.conf
@@ -6,3 +6,7 @@
 
 # Disable the unspupported UART0 driver
 CONFIG_NRFX_UARTE0=n
+
+# Don't get entropy from HCI on nRF54H20 devices
+CONFIG_BT_HOST_CRYPTO_PRNG=y
+CONFIG_ENTROPY_BT_HCI=n