diff --git a/bsp/stm32f10x/drivers/gpio.c b/bsp/stm32f10x/drivers/gpio.c
index f07c0a1c36..8e3209dc3d 100755
--- a/bsp/stm32f10x/drivers/gpio.c
+++ b/bsp/stm32f10x/drivers/gpio.c
@@ -10,7 +10,7 @@
  * Change Logs:
  * Date           Author            Notes
  * 2015-03-24     Bright            the first version
- * 2016-05-23     Margguo@gmail.com   Add  48 pins IC define
+ * 2016-05-23     Margguo@gmail.com Add  48 pins IC define
  */
 
 #include <rthw.h>
@@ -20,7 +20,7 @@
 
 #ifdef RT_USING_PIN
 
-#define STM32F10X_PIN_NUMBERS 48 //[48, 64, 100, 144 ]
+#define STM32F10X_PIN_NUMBERS 100 //[48, 64, 100, 144 ]
 
 #define __STM32_PIN(index, rcc, gpio, gpio_index) { 0, RCC_##rcc##Periph_GPIO##gpio, GPIO##gpio, GPIO_Pin_##gpio_index}
 #define __STM32_PIN_DEFAULT {-1, 0, 0, 0}