diff --git a/en-US/markdown/agora-chat/Develop/Presence/agora_chat_presence_flutter.md b/en-US/markdown/agora-chat/Develop/Presence/agora_chat_presence_flutter.md
index b97122ec3c4..747a7e886cf 100644
--- a/en-US/markdown/agora-chat/Develop/Presence/agora_chat_presence_flutter.md
+++ b/en-US/markdown/agora-chat/Develop/Presence/agora_chat_presence_flutter.md
@@ -100,12 +100,12 @@ Refer to the following code sample to listen for presence status updates:
 
 ### Unsubscribe from the presence status of one or more users
 
-You can call `unSubscribe` to unsubscribe from the presence statuses of the specified users, as shown in the following code sample:
+You can call `unsubscribe` to unsubscribe from the presence statuses of the specified users, as shown in the following code sample:
 
 ```dart
 // memberIds: The ID list of users from whom you unsubscribe.
 try {
-  await ChatClient.getInstance.presenceManager.unSubscribe(
+  await ChatClient.getInstance.presenceManager.unsubscribe(
     members: members,
   );
 } on ChatError catch (e) {