diff --git a/docs/async.md b/docs/async.md
index 09d2940b..8782cdea 100644
--- a/docs/async.md
+++ b/docs/async.md
@@ -109,7 +109,7 @@ When sending a streaming request body with an `AsyncClient` instance, you should
 async def upload_bytes():
     ...  # yield byte content
 
-await client.post(url, data=upload_bytes())
+await client.post(url, content=upload_bytes())
 ```
 
 ### Explicit transport instances