diff --git a/README.md b/README.md
index 41ee54d..c9f0413 100644
--- a/README.md
+++ b/README.md
@@ -79,7 +79,7 @@ LONG_PRESS_HOLD | 长按期间一直触发
 ```c
 #include "button.h"
 
-unit8_t btn1_id = 0;
+uint8_t btn1_id = 0;
 
 struct Button btn1;