diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c
index acba83156de9..18793c485319 100644
--- a/drivers/bluetooth/hci_ldisc.c
+++ b/drivers/bluetooth/hci_ldisc.c
@@ -716,6 +716,7 @@ static int hci_uart_set_proto(struct hci_uart *hu, int id)
 
 	err = hci_uart_register_dev(hu);
 	if (err) {
+		clear_bit(HCI_UART_PROTO_INIT, &hu->flags);
 		return err;
 	}