diff --git a/drivers/bluetooth/btmtk.c b/drivers/bluetooth/btmtk.c
index cef7a6405e1d..099188bf772e 100644
--- a/drivers/bluetooth/btmtk.c
+++ b/drivers/bluetooth/btmtk.c
@@ -1029,7 +1029,8 @@ static int __set_mtk_intr_interface(struct hci_dev *hdev)
 	if (!btmtk_data->isopkt_intf)
 		return -ENODEV;
 
-	err = usb_set_interface(btmtk_data->udev, MTK_ISO_IFNUM, 1);
+	err = usb_set_interface(btmtk_data->udev, MTK_ISO_IFNUM,
+			       (intf->num_altsetting > 1) ? 1 : 0);
 	if (err < 0) {
 		bt_dev_err(hdev, "setting interface failed (%d)", -err);
 		return err;