diff --git a/lib/nntp/tiny/session.py b/lib/nntp/tiny/session.py
index a510eda..d34638b 100644
--- a/lib/nntp/tiny/session.py
+++ b/lib/nntp/tiny/session.py
@@ -730,6 +730,7 @@ class Session():
         'HDR':          _cmd_hdr,
         'XHDR':         _cmd_hdr,
         'OVER':         _cmd_over,
+        'XOVER':        _cmd_over,
         'STAT':         _cmd_stat,
         'DATE':         _cmd_date,
         'QUIT':         _cmd_quit,