diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 00cba28d5351ad31bc94749bd8d9985902cea3da..b3d5a23ab56fbf5c3832aa76d69e27caf15a9ff4 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1378,6 +1378,13 @@ static struct usb_device_id acm_ids[] = {
 	},
 	{ USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
 	},
+	{ USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
+	.driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
+					   data interface instead of
+					   communications interface.
+					   Maybe we should define a new
+					   quirk for this. */
+	},
 
 	/* control interfaces with various AT-command sets */
 	{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,