diff --git a/components/drivers/include/drivers/serial.h b/components/drivers/include/drivers/serial.h
index 3d118fb45b..41132ed916 100644
--- a/components/drivers/include/drivers/serial.h
+++ b/components/drivers/include/drivers/serial.h
@@ -56,7 +56,7 @@
 #define NRZ_INVERTED                    1       /* Non Return to Zero : inverted mode */
 
 #ifndef RT_SERIAL_RB_BUFSZ
-#define RT_SERIAL_RB_BUFSZ				64
+#define RT_SERIAL_RB_BUFSZ              64
 #endif
 
 #define RT_DEVICE_CTRL_CONFIG           0x03    /* configure device */
diff --git a/components/drivers/include/drivers/usb_common.h b/components/drivers/include/drivers/usb_common.h
index 68944f43ef..979deb4732 100644
--- a/components/drivers/include/drivers/usb_common.h
+++ b/components/drivers/include/drivers/usb_common.h
@@ -3,9 +3,19 @@
  * This file is part of RT-Thread RTOS
  * COPYRIGHT (C) 2012, RT-Thread Development Team
  *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rt-thread.org/license/LICENSE
+ *  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 2 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.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Change Logs:
  * Date           Author       Notes