diff --git a/include/linux/usb/ch9.h b/include/linux/usb/ch9.h
index 6169438..7e1da17 100644
--- a/include/linux/usb/ch9.h
+++ b/include/linux/usb/ch9.h
@@ -180,6 +180,7 @@
 #define USB_DT_WIRELESS_ENDPOINT_COMP	0x11
 #define USB_DT_WIRE_ADAPTER		0x21
 #define USB_DT_RPIPE			0x22
+#define USB_DT_CS_RADIO_CONTROL		0x23
 
 /* Conventional codes for class-specific descriptors.  The convention is
  * defined in the USB "Common Class" Spec (3.11).  Individual class specs