diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c
index e68821d074b0..7e31d5f1bc8a 100644
--- a/drivers/bluetooth/hci_ldisc.c
+++ b/drivers/bluetooth/hci_ldisc.c
@@ -208,6 +208,7 @@ static int hci_uart_close(struct hci_dev *hdev)
 		return 0;
 
 	hci_uart_flush(hdev);
+	hdev->flush = NULL;
 	return 0;
 }