Index: uspace/lib/usb/include/usb/classes/hid.h
===================================================================
--- uspace/lib/usb/include/usb/classes/hid.h	(revision d321cd780838478bc8fd9414791e59d817e9979f)
+++ uspace/lib/usb/include/usb/classes/hid.h	(revision b43bcf151488aba5398a145c208ce8f6a1675ae0)
@@ -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. */