diff --git a/Doc/library/asyncio-stream.rst b/Doc/library/asyncio-stream.rst
index 95a8e4649beede..ecf178adcd377e 100644
--- a/Doc/library/asyncio-stream.rst
+++ b/Doc/library/asyncio-stream.rst
@@ -352,6 +352,7 @@ TCP echo client using the :func:`asyncio.open_connection` function::
 
         print(f'Send: {message!r}')
         writer.write(message.encode())
+        await writer.drain()
 
         data = await reader.read(100)
         print(f'Received: {data.decode()!r}')