diff --git a/lib/xenu_nntp/session.py b/lib/xenu_nntp/session.py
index ca0993c..6cfb102 100644
--- a/lib/xenu_nntp/session.py
+++ b/lib/xenu_nntp/session.py
@@ -666,8 +666,6 @@ class Session(Connection):
             'date':       True,
             'message-id': True,
             'references': True,
-            'bytes':      True,
-            'lines':      True,
         }
 
         for k in message.headers: