diff --git a/bindings/python/README.md b/bindings/python/README.md
index 44d850094c04..b4049a5768a3 100644
--- a/bindings/python/README.md
+++ b/bindings/python/README.md
@@ -24,7 +24,7 @@ Or using the async API:
 ```python
 import asyncio
 
-async main():
+async def main():
     op = opendal.AsyncOperator("fs", root="/tmp")
     await op.write("test.txt", "Hello World")
     print(await op.read("test.txt"))