diff --git a/headers/os/drivers/usb/USB_hid.h b/headers/os/drivers/usb/USB_hid.h
index d7a0c3240b..913e812d7e 100644
--- a/headers/os/drivers/usb/USB_hid.h
+++ b/headers/os/drivers/usb/USB_hid.h
@@ -1,5 +1,13 @@
-#ifndef USB_HID_H
-#define USB_HID_H
+/*
+ * Copyright 2004-2009, Haiku Inc. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef _USB_HID_H
+#define _USB_HID_H
+
+
+#include <SupportDefs.h>
+
 
 // (Partial) USB Class Definitions for HID Devices, version 1.11
 // Reference: http://www.usb.org/developers/devclass_docs/hid1_11.pdf
@@ -7,22 +15,25 @@
 #define USB_HID_DEVICE_CLASS 			0x03
 #define USB_HID_CLASS_VERSION			0x0100
 
-enum { // HID Interface Subclasses
+// HID Interface Subclasses
+enum {
 	USB_HID_INTERFACE_NO_SUBCLASS = 0x00,	//  No Subclass
 	USB_HID_INTERFACE_BOOT_SUBCLASS			//	Boot Interface Subclass
 };
 
-enum { // HID Class-Specific descriptor subtypes
+// HID Class-Specific descriptor subtypes
+enum {
 	USB_HID_DESCRIPTOR_HID						= 0x21,
 	USB_HID_DESCRIPTOR_REPORT,
 	USB_HID_DESCRIPTOR_PHYSICAL
 };
 
-enum { // HID Class-specific requests
+// HID Class-specific requests
+enum {
 	USB_REQUEST_HID_GET_REPORT		= 0x01,
 	USB_REQUEST_HID_GET_IDLE,
 	USB_REQUEST_HID_GET_PROTOCOL,
-	
+
 	USB_REQUEST_HID_SET_REPORT = 0x09,
 	USB_REQUEST_HID_SET_IDLE,
 	USB_REQUEST_HID_SET_PROTOCOL
@@ -41,9 +52,7 @@ typedef struct {
 } _PACKED usb_hid_descriptor;
 
 
-/*
-	Usage Pages/IDs
-*/
+/* Usage Pages/IDs */
 
 enum {
 	USAGE_PAGE_GENERIC_DESKTOP = 0x1,
@@ -76,7 +85,7 @@ enum {
 	USAGE_ID_KEYBOARD,
 	USAGE_ID_KEYPAD,
 	USAGE_ID_MULTIAXIS = 0x8,
-	
+
 	USAGE_ID_X = 0x30,
 	USAGE_ID_Y,
 	USAGE_ID_Z,
@@ -109,4 +118,4 @@ enum {
 	USAGE_ID_THROTTLE = 0xBB,
 };
 
-#endif	// USB_HID_H
+#endif	// _USB_HID_H