diff --git a/sanic/server.py b/sanic/server.py
index bde6def7..2e6be4a5 100644
--- a/sanic/server.py
+++ b/sanic/server.py
@@ -87,6 +87,7 @@ class HttpProtocol(asyncio.Protocol):
         "_header_fragment",
         "state",
         "_debug",
+        "_body_chunks",
     )
 
     def __init__(