Index: uspace/lib/usb/include/usb/classes/hid.h
===================================================================
--- uspace/lib/usb/include/usb/classes/hid.h	(revision 4e8e1f51aca228845c8d503a3f52fbf34a47bb20)
+++ uspace/lib/usb/include/usb/classes/hid.h	(revision 67b6fc5853a7bb19dd26cf0e0035db90c42d1bfe)
@@ -50,4 +50,10 @@
 	USB_HIDREQ_SET_PROTOCOL = 11
 } usb_hid_request_t;
+
+/** USB/HID subclass constants. */
+typedef enum {
+	USB_HID_SUBCLASS_NONE = 0,
+	USB_HID_SUBCLASS_BOOT = 1
+} usb_hid_subclass_t;
 
 /** USB/HID interface protocols. */