diff --git a/[refs] b/[refs]
index f30752f05cd5..9c8a77ae1e35 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 902ffc3c707c1d459ea57428a619a807cbe412f9
+refs/heads/master: 5b239f0aebd4dd6f85b13decf5e18e86e35d57f0
diff --git a/trunk/drivers/usb/class/cdc-acm.c b/trunk/drivers/usb/class/cdc-acm.c
index a3d6c4db2a03..597defc1d7bf 100644
--- a/trunk/drivers/usb/class/cdc-acm.c
+++ b/trunk/drivers/usb/class/cdc-acm.c
@@ -1615,6 +1615,10 @@ static const struct usb_device_id acm_ids[] = {
 	.driver_info = NOT_A_MODEM,
        	},
 
+	/* control interfaces without any protocol set */
+	{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
+		USB_CDC_PROTO_NONE) },
+
 	/* control interfaces with various AT-command sets */
 	{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
 		USB_CDC_ACM_PROTO_AT_V25TER) },