diff --git a/README.md b/README.md
index 45e59cf..f2ef0de 100644
--- a/README.md
+++ b/README.md
@@ -53,7 +53,7 @@ document.addEventListener(
 ### 用户加入房间事件
 
 ```typescript
-ocument.addEventListener(
+document.addEventListener(
       cordova.plugin.trtc.Constant.EVENT_ON_USER_VIDEO_AVAILABLE,
       (event: {room:string,userId:string,available:boolean}) => {
       },