diff --git a/rt-thread-version/rt-thread-standard/programming-manual/device/pin/pin.md b/rt-thread-version/rt-thread-standard/programming-manual/device/pin/pin.md
index 779fa486aef11f45a4b706e53f4cd713cab13d3d..cf717af0c528d7f323099fa5dfb9f815eaec77f9 100644
--- a/rt-thread-version/rt-thread-standard/programming-manual/device/pin/pin.md
+++ b/rt-thread-version/rt-thread-standard/programming-manual/device/pin/pin.md
@@ -39,7 +39,7 @@ RT-Thread 提供的引脚编号需要和芯片的引脚号区分开来，它们
 使用 rt_pin_get() 获取引脚编号，如下获取 PF9 的引脚编号：
 
 ```c
-pin_number = rt_pin_get("F.9");
+pin_number = rt_pin_get("PF.9");
 ```
 
 #### 使用宏定义