diff --git a/usbdrv/usbconfig.h b/usbdrv/usbconfig.h
index 31b10ee..106c4d7 100644
--- a/usbdrv/usbconfig.h
+++ b/usbdrv/usbconfig.h
@@ -282,7 +282,7 @@ extern void hadUsbReset(void); // define the function for usbdrv.c
  * CDC class is 2, use subclass 2 and protocol 1 for ACM
  */
 /* #define USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH    42 */
-#define USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH    52
+#define USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH    56
 /* Define this to the length of the HID report descriptor, if you implement
  * an HID device. Otherwise don't define it or define it to 0.
  * If you use this define, you must add a PROGMEM character array named