diff --git a/reactos/include/ntos/cdrom.h b/reactos/include/ntos/cdrom.h
index 1e58aa4712e..92e74835cf1 100644
--- a/reactos/include/ntos/cdrom.h
+++ b/reactos/include/ntos/cdrom.h
@@ -1,4 +1,4 @@
-/* $Id: cdrom.h,v 1.5 2002/11/16 00:08:45 ekohl Exp $
+/* $Id: cdrom.h,v 1.6 2003/06/26 20:02:03 ekohl Exp $
  *
  * COPYRIGHT:    See COPYING in the top level directory
  * PROJECT:      ReactOS kernel
@@ -12,9 +12,15 @@
 #ifndef __INCLUDE_NTOS_CDROM_H
 #define __INCLUDE_NTOS_CDROM_H
 
-#define IOCTL_CDROM_READ_TOC		CTL_CODE(FILE_DEVICE_CD_ROM, 0x0000, METHOD_BUFFERED, FILE_READ_ACCESS)
-#define IOCTL_CDROM_GET_LAST_SESSION	CTL_CODE(FILE_DEVICE_CD_ROM, 0x000E, METHOD_BUFFERED, FILE_READ_ACCESS)
-#define IOCTL_CDROM_GET_DRIVE_GEOMETRY	CTL_CODE(FILE_DEVICE_CD_ROM, 0x0013, METHOD_BUFFERED, FILE_READ_ACCESS)
+
+#define IOCTL_CDROM_BASE                FILE_DEVICE_CD_ROM
+
+#define IOCTL_CDROM_READ_TOC            CTL_CODE(IOCTL_CDROM_BASE, 0x0000, METHOD_BUFFERED, FILE_READ_ACCESS)
+#define IOCTL_CDROM_GET_LAST_SESSION    CTL_CODE(IOCTL_CDROM_BASE, 0x000E, METHOD_BUFFERED, FILE_READ_ACCESS)
+#define IOCTL_CDROM_GET_DRIVE_GEOMETRY  CTL_CODE(IOCTL_CDROM_BASE, 0x0013, METHOD_BUFFERED, FILE_READ_ACCESS)
+
+#define IOCTL_CDROM_CHECK_VERIFY        CTL_CODE(IOCTL_CDROM_BASE, 0x0200, METHOD_BUFFERED, FILE_READ_ACCESS)
+
 
 #define MAXIMUM_NUMBER_TRACKS		100
 #define MAXIMUM_CDROM_SIZE		804