diff --git a/README.md b/README.md
index 87a13cb8..5b1b43ba 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ bbs: [中文论坛Chinese bbs](http://bbs.nodemcu.com)<br />
 Tencent QQ group QQ群: 309957875<br />
 
 # Change log
-2015-01-05<br />
+2015-01-06<br />
 update sdk to 0.9.5.<br />
 pre_build bin now compiled by gcc toolchain.<br />
 memory/heap usage optimized.<br />
diff --git a/app/include/user_config.h b/app/include/user_config.h
index 63ed16b0..5d821a9d 100644
--- a/app/include/user_config.h
+++ b/app/include/user_config.h
@@ -7,7 +7,7 @@
 #define NODE_VERSION_INTERNAL   0U
 
 #define NODE_VERSION	"NodeMcu 0.9.5"
-#define BUILD_DATE	    "build 20150105"
+#define BUILD_DATE	    "build 20150106"
 
 // #define FLASH_512K
 // #define FLASH_1M
diff --git a/app/libc/c_stdio.c b/app/libc/c_stdio.c
index 88c135b1..0d52d29c 100644
--- a/app/libc/c_stdio.c
+++ b/app/libc/c_stdio.c
@@ -1,7 +1,6 @@
 #include "c_stdio.h"
 // #include "driver/uart.h"
 
-unsigned char __print_buf[BUFSIZ];
 int c_stdin = 999;
 int c_stdout = 1000;
 int c_stderr = 1001;
diff --git a/app/libc/c_stdio.h b/app/libc/c_stdio.h
index d08effbf..d8302a38 100644
--- a/app/libc/c_stdio.h
+++ b/app/libc/c_stdio.h
@@ -49,12 +49,13 @@ extern int c_stderr;
 
 extern void output_redirect(const char *str);
 #define c_puts output_redirect
-extern unsigned char __print_buf[BUFSIZ];
+
 // #define c_printf os_printf
 // int	c_printf(const char *c, ...);
 #define c_sprintf os_sprintf
 // #define c_vsprintf ets_vsprintf
 #define c_printf(...) do {					\
+	unsigned char __print_buf[BUFSIZ];		\
 	c_sprintf(__print_buf, __VA_ARGS__);	\
 	c_puts(__print_buf);					\
 } while(0)
diff --git a/pre_build/0.9.5/nodemcu_20150105.bin b/pre_build/0.9.5/nodemcu_20150106.bin
similarity index 72%
rename from pre_build/0.9.5/nodemcu_20150105.bin
rename to pre_build/0.9.5/nodemcu_20150106.bin
index fd9f281c..7b13f9cd 100644
Binary files a/pre_build/0.9.5/nodemcu_20150105.bin and b/pre_build/0.9.5/nodemcu_20150106.bin differ
diff --git a/pre_build/0.9.5/nodemcu_latest.bin b/pre_build/0.9.5/nodemcu_latest.bin
index fd9f281c..7b13f9cd 100644
Binary files a/pre_build/0.9.5/nodemcu_latest.bin and b/pre_build/0.9.5/nodemcu_latest.bin differ
diff --git a/pre_build/latest/nodemcu_512k_latest.bin b/pre_build/latest/nodemcu_512k_latest.bin
index fd9f281c..7b13f9cd 100644
Binary files a/pre_build/latest/nodemcu_512k_latest.bin and b/pre_build/latest/nodemcu_512k_latest.bin differ
diff --git a/pre_build/latest/nodemcu_latest.bin b/pre_build/latest/nodemcu_latest.bin
index fd9f281c..7b13f9cd 100644
Binary files a/pre_build/latest/nodemcu_latest.bin and b/pre_build/latest/nodemcu_latest.bin differ