diff --git a/bootinfo.c b/bootinfo.c
index 2f75744..48baad7 100644
--- a/bootinfo.c
+++ b/bootinfo.c
@@ -24,12 +24,7 @@
 #include <stdlib.h>
 #include <string.h>
 
-
-typedef unsigned char u8;
-typedef unsigned char __u8;
-typedef unsigned int u32;
-typedef unsigned int __u32;
-typedef signed int __s32;
+#include "types.h"
 
 /* boot_file_head copied from mksunxiboot */
 /* boot head definition from sun4i boot code */
diff --git a/include/types.h b/include/types.h
new file mode 100644
index 0000000..ebf5f15
--- /dev/null
+++ b/include/types.h
@@ -0,0 +1,26 @@
+#ifndef SUNXI_TYPES_H
+#define SUNXI_TYPES_H
+
+#include <stdint.h>
+
+#define __s8	int8_t
+#define __s16	int16_t
+#define __s32	int32_t
+#define __s64	int64_t
+
+#define s8	int8_t
+#define s16	int16_t
+#define s32	int32_t
+#define s64	int64_t
+
+#define __u8	uint8_t
+#define __u16	uint16_t
+#define __u32	uint32_t
+#define __u64	uint64_t
+
+#define u8	uint8_t
+#define u16	uint16_t
+#define u32	uint32_t
+#define u64	uint64_t
+
+#endif
diff --git a/nand-part.h b/nand-part.h
index 600c895..2cac1bb 100644
--- a/nand-part.h
+++ b/nand-part.h
@@ -23,7 +23,7 @@
 #ifndef    __MBR_H__
 #define    __MBR_H__
 
-#include "type_def.h"
+#include "types.h"
 
 #define MAX_PART_COUNT		15	 									//max part count
 #define MBR_COPY_NUM        4    									//mbr backup count
diff --git a/type_def.h b/type_def.h
deleted file mode 100755
index 0580aa5..0000000
--- a/type_def.h
+++ /dev/null
@@ -1,59 +0,0 @@
-/*
- * drivers/block/sun4i_nand/include/type_def.h
- *
- * (C) Copyright 2007-2012
- * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
- *
- * 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., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#ifndef TYPE_DEF_H
-#define TYPE_DEF_H
-
-//#include "sunii.h"
-// #include <linux/kernel.h>
-
-//typedef signed char s8;
-//typedef unsigned char u8;
-//
-//typedef signed short s16;
-//typedef unsigned short u16;
-//
-//typedef signed int s32;
-//typedef unsigned int u32;
-//
-//typedef signed long s64;
-//typedef unsigned long u64;
-//
-typedef signed char __s8;
-typedef unsigned char __u8;
-//
-typedef signed short __s16;
-typedef unsigned short __u16;
-//
-typedef signed int __s32;
-typedef unsigned int __u32;
-//
-typedef signed long __s64;
-typedef unsigned long __u64;
-
-  typedef unsigned int __hdle;
-
-#define EPDK_OK 0
-#define EPDK_FAIL -1
-
-
-#endif