diff --git a/module_usb_audio/user_hid.h b/module_usb_audio/user_hid.h
index e834aa04..dd0b355e 100644
--- a/module_usb_audio/user_hid.h
+++ b/module_usb_audio/user_hid.h
@@ -1,3 +1,12 @@
 
+
+/* These defines relate to the HID report desc - do not mod */
+#define HID_CONTROL_PLAYPAUSE_SHIFT    0x01
+#define HID_CONTROL_NEXT_SHIFT 		   0x02
+#define HID_CONTROL_PREV_SHIFT		   0x03
+#define HID_CONTROL_VOLUP_SHIFT        0x04
+#define HID_CONTROL_VOLDN_SHIFT		   0x05
+#define HID_CONTROL_MUTE_SHIFT		   0x06
+
 void UserReadHIDButtons(unsigned char hidData[]);