diff --git a/flight/PiOS/inc/pios_usb_board_data_priv.h b/flight/PiOS/inc/pios_usb_board_data_priv.h
index 49166c25f..f4e7f7c05 100644
--- a/flight/PiOS/inc/pios_usb_board_data_priv.h
+++ b/flight/PiOS/inc/pios_usb_board_data_priv.h
@@ -1 +1,40 @@
+/**
+ ******************************************************************************
+ * @addtogroup PIOS PIOS Core hardware abstraction layer
+ * @{
+ * @addtogroup PIOS_USB_BOARD USB board layer functions
+ * @{
+ *
+ * @file       pios_usb_board_data_priv.h
+ * @author     The OpenPilot Team, http://www.openpilot.org Copyright (C) 2010.
+ * @brief      Defines the API to the board-specific USB data setup code
+ * @see        The GNU Public License (GPL) Version 3
+ *
+ *****************************************************************************/
+/* 
+ * This program is free software; you can redistribute it and/or modify 
+ * it under the terms of the GNU General Public License as published by 
+ * the Free Software Foundation; either version 3 of the License, or 
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful, but 
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 
+ * for more details.
+ * 
+ * You should have received a copy of the GNU General Public License along 
+ * with this program; if not, write to the Free Software Foundation, Inc., 
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef PIOS_USB_BOARD_DATA_PRIV_H
+#define PIOS_USB_BOARD_DATA_PRIV_H
+
 extern int32_t PIOS_USB_BOARD_DATA_Init(void);
+
+#endif /* PIOS_USB_BOARD_DATA_PRIV_H */
+
+/**
+  * @}
+  * @}
+  */
diff --git a/flight/PiOS/inc/pios_usb_desc_hid_cdc_priv.h b/flight/PiOS/inc/pios_usb_desc_hid_cdc_priv.h
index 4836f4569..2ae94c74e 100644
--- a/flight/PiOS/inc/pios_usb_desc_hid_cdc_priv.h
+++ b/flight/PiOS/inc/pios_usb_desc_hid_cdc_priv.h
@@ -1,3 +1,32 @@
+/**
+ ******************************************************************************
+ * @addtogroup PIOS PIOS Core hardware abstraction layer
+ * @{
+ * @addtogroup PIOS_USB_DESC USB descriptor layer functions
+ * @{
+ *
+ * @file       pios_usb_desc_hid_cdc_priv.h
+ * @author     The OpenPilot Team, http://www.openpilot.org Copyright (C) 2010.
+ * @brief      Defines the API to set up the HID + CDC USB descriptor config
+ * @see        The GNU Public License (GPL) Version 3
+ *
+ *****************************************************************************/
+/* 
+ * This program is free software; you can redistribute it and/or modify 
+ * it under the terms of the GNU General Public License as published by 
+ * the Free Software Foundation; either version 3 of the License, or 
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful, but 
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 
+ * for more details.
+ * 
+ * You should have received a copy of the GNU General Public License along 
+ * with this program; if not, write to the Free Software Foundation, Inc., 
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
 #ifndef PIOS_USB_DESC_HID_CDC_PRIV_H
 #define PIOS_USB_DESC_HID_CDC_PRIV_H
 
@@ -6,3 +35,8 @@
 extern int32_t PIOS_USB_DESC_HID_CDC_Init(void);
 
 #endif	/* PIOS_USB_DESC_HID_CDC_PRIV_H */
+
+/**
+  * @}
+  * @}
+  */
diff --git a/flight/PiOS/inc/pios_usb_desc_hid_only_priv.h b/flight/PiOS/inc/pios_usb_desc_hid_only_priv.h
index 5d161d233..321d15efa 100644
--- a/flight/PiOS/inc/pios_usb_desc_hid_only_priv.h
+++ b/flight/PiOS/inc/pios_usb_desc_hid_only_priv.h
@@ -1,3 +1,32 @@
+/**
+ ******************************************************************************
+ * @addtogroup PIOS PIOS Core hardware abstraction layer
+ * @{
+ * @addtogroup PIOS_USB_DESC USB descriptor layer functions
+ * @{
+ *
+ * @file       pios_usb_desc_hid_only_priv.h
+ * @author     The OpenPilot Team, http://www.openpilot.org Copyright (C) 2010.
+ * @brief      Defines the API to set up the HID-only USB descriptor config
+ * @see        The GNU Public License (GPL) Version 3
+ *
+ *****************************************************************************/
+/* 
+ * This program is free software; you can redistribute it and/or modify 
+ * it under the terms of the GNU General Public License as published by 
+ * the Free Software Foundation; either version 3 of the License, or 
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful, but 
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 
+ * for more details.
+ * 
+ * You should have received a copy of the GNU General Public License along 
+ * with this program; if not, write to the Free Software Foundation, Inc., 
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
 #ifndef PIOS_USB_DESC_HID_ONLY_PRIV_H
 #define PIOS_USB_DESC_HID_ONLY_PRIV_H
 
@@ -6,3 +35,8 @@
 extern int32_t PIOS_USB_DESC_HID_ONLY_Init(void);
 
 #endif	/* PIOS_USB_DESC_HID_ONLY_PRIV_H */
+
+/**
+  * @}
+  * @}
+  */