diff --git a/docs/source/developers/index.md b/docs/source/developers/index.md
index d3ac9ab32..eee528bb3 100644
--- a/docs/source/developers/index.md
+++ b/docs/source/developers/index.md
@@ -145,7 +145,7 @@ class CustomChatHandler(BaseChatHandler):
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
 
-    async def _process_message(self, message: HumanChatMessage):
+    async def process_message(self, message: HumanChatMessage):
         # Put your custom logic here
 ```