Add missing import for AsyncHTTPClient

Add missing import for AsyncHTTPClient for Future example

diff --git a/docs/guide/async.rst b/docs/guide/async.rst
index 60f8a23b34a77151829a2613c9dd031b751ab651..fb350d94206fd07577fc5ad56b9ff6eab2ecf6c2 100644 (file)
--- a/docs/guide/async.rst
+++ b/docs/guide/async.rst
@@ -91,6 +91,7 @@ And again with a `.Future` instead of a callback:
 .. testcode::
 
     from tornado.concurrent import Future
+    from tornado.httpclient import AsyncHTTPClient
 
     def async_fetch_future(url):
         http_client = AsyncHTTPClient()