diff --git a/lib/py/src/transport/TTwisted.py b/lib/py/src/transport/TTwisted.py
index b5c2147..7b24232 100644
--- a/lib/py/src/transport/TTwisted.py
+++ b/lib/py/src/transport/TTwisted.py
@@ -57,6 +57,8 @@
 
 class ThriftClientProtocol(basic.Int32StringReceiver):
 
+    MAX_LENGTH = 2 ** 31
+
     def __init__(self, client_class, iprot_factory, oprot_factory=None):
         self._client_class = client_class
         self._iprot_factory = iprot_factory
@@ -99,6 +101,8 @@
 
 class ThriftServerProtocol(basic.Int32StringReceiver):
 
+    MAX_LENGTH = 2 ** 31
+
     def dispatch(self, msg):
         self.sendString(msg)