diff --git a/lib/py/src/Thrift.py b/lib/py/src/Thrift.py
index 0c4a458..1be84e2 100644
--- a/lib/py/src/Thrift.py
+++ b/lib/py/src/Thrift.py
@@ -2,5 +2,5 @@
 
   """Base class for procsessor, which works on two streams."""
 
-  def process(itrans, otrans):
+  def process(iprot, oprot):
     pass