fix issue #2448

diff --git a/tornado/http1connection.py b/tornado/http1connection.py
index af7abe7c856db0ad59c76c44bebdf84d691239e1..6cc4071c4db3a3b53011fa83dc77539f71cd83c3 100644 (file)
--- a/tornado/http1connection.py
+++ b/tornado/http1connection.py
@@ -411,7 +411,7 @@ class HTTP1Connection(httputil.HTTPConnection):
             if chunk:
                 data += self._format_chunk(chunk)
             self._pending_write = self.stream.write(data)
-            self._pending_write.add_done_callback(self._on_write_complete)
+            future_add_done_callback(self._pending_write, self._on_write_complete)
         return future
 
     def _format_chunk(self, chunk):