diff --git a/lib/xenu_nntp/session.py b/lib/xenu_nntp/session.py
index aba0d90..a3395ca 100644
--- a/lib/xenu_nntp/session.py
+++ b/lib/xenu_nntp/session.py
@@ -354,6 +354,7 @@ class Session(Connection):
         'References',
         'Bytes',
         'Lines',
+        'Xref',
     ]
 
     def _cmd_list_overview_fmt(self):