diff --git a/libc/kernel/uapi/linux/hid.h b/libc/kernel/uapi/linux/hid.h
index ce93cd7..37ab462 100644
--- a/libc/kernel/uapi/linux/hid.h
+++ b/libc/kernel/uapi/linux/hid.h
@@ -22,12 +22,20 @@
 #define USB_INTERFACE_SUBCLASS_BOOT 1
 #define USB_INTERFACE_PROTOCOL_KEYBOARD 1
 #define USB_INTERFACE_PROTOCOL_MOUSE 2
-#define HID_REQ_GET_REPORT 0x01
-#define HID_REQ_GET_IDLE 0x02
-#define HID_REQ_GET_PROTOCOL 0x03
-#define HID_REQ_SET_REPORT 0x09
-#define HID_REQ_SET_IDLE 0x0A
-#define HID_REQ_SET_PROTOCOL 0x0B
+enum hid_report_type {
+  HID_INPUT_REPORT = 0,
+  HID_OUTPUT_REPORT = 1,
+  HID_FEATURE_REPORT = 2,
+  HID_REPORT_TYPES,
+};
+enum hid_class_request {
+  HID_REQ_GET_REPORT = 0x01,
+  HID_REQ_GET_IDLE = 0x02,
+  HID_REQ_GET_PROTOCOL = 0x03,
+  HID_REQ_SET_REPORT = 0x09,
+  HID_REQ_SET_IDLE = 0x0A,
+  HID_REQ_SET_PROTOCOL = 0x0B,
+};
 #define HID_DT_HID (USB_TYPE_CLASS | 0x01)
 #define HID_DT_REPORT (USB_TYPE_CLASS | 0x02)
 #define HID_DT_PHYSICAL (USB_TYPE_CLASS | 0x03)