diff --git a/drivers/bluetooth/hci/h4.c b/drivers/bluetooth/hci/h4.c
index fe30a6a370d..20f3b3572a7 100644
--- a/drivers/bluetooth/hci/h4.c
+++ b/drivers/bluetooth/hci/h4.c
@@ -271,4 +271,4 @@ static int _bt_uart_init(struct device *unused)
 	return 0;
 }
 
-SYS_INIT(_bt_uart_init, NANOKERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE);
+SYS_INIT(_bt_uart_init, POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE);
diff --git a/drivers/bluetooth/hci/h5.c b/drivers/bluetooth/hci/h5.c
index 11cb108230c..90b26e1a123 100644
--- a/drivers/bluetooth/hci/h5.c
+++ b/drivers/bluetooth/hci/h5.c
@@ -761,4 +761,4 @@ static int _bt_uart_init(struct device *unused)
 	return 0;
 }
 
-SYS_INIT(_bt_uart_init, NANOKERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE);
+SYS_INIT(_bt_uart_init, POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE);
diff --git a/drivers/bluetooth/nble/uart.c b/drivers/bluetooth/nble/uart.c
index 8ab89adfdbe..8bc957f05d4 100644
--- a/drivers/bluetooth/nble/uart.c
+++ b/drivers/bluetooth/nble/uart.c
@@ -257,5 +257,5 @@ static int _bt_nble_init(struct device *unused)
 	return 0;
 }
 
-DEVICE_INIT(bt_nble, "", _bt_nble_init, NULL, NULL, NANOKERNEL,
+DEVICE_INIT(bt_nble, "", _bt_nble_init, NULL, NULL, POST_KERNEL,
 	    CONFIG_KERNEL_INIT_PRIORITY_DEVICE);