Index: /trunk/src/VBox/HostDrivers/Support/SUPDrvIOC.h
===================================================================
--- /trunk/src/VBox/HostDrivers/Support/SUPDrvIOC.h	(revision 67981)
+++ /trunk/src/VBox/HostDrivers/Support/SUPDrvIOC.h	(revision 67982)
@@ -214,4 +214,6 @@
  * @todo Pending work on next major version change:
  *          - nothing.
+ *
+ * @remarks 0x002a0000 is used by 5.1. The next version number must be 0x002b0000.
  */
 #define SUPDRV_IOC_VERSION                              0x00290000