diff --git a/include/uapi/linux/usb/cdc.h b/include/uapi/linux/usb/cdc.h
index 6d61550959ef..372c81425cae 100644
--- a/include/uapi/linux/usb/cdc.h
+++ b/include/uapi/linux/usb/cdc.h
@@ -271,6 +271,10 @@ struct usb_cdc_line_coding {
 	__u8	bDataBits;
 } __attribute__ ((packed));
 
+/* Control Signal Bitmap Values from 6.2.14 SetControlLineState */
+#define USB_CDC_CTRL_DTR			(1 << 0)
+#define USB_CDC_CTRL_RTS			(1 << 1)
+
 /* table 62; bits in multicast filter */
 #define	USB_CDC_PACKET_TYPE_PROMISCUOUS		(1 << 0)
 #define	USB_CDC_PACKET_TYPE_ALL_MULTICAST	(1 << 1) /* no filter */