diff --git a/lib/xenu_nntp/session.py b/lib/xenu_nntp/session.py
index 7d1923d..c093800 100644
--- a/lib/xenu_nntp/session.py
+++ b/lib/xenu_nntp/session.py
@@ -370,7 +370,7 @@ class Session(Connection):
         ':bytes',
     ]
 
-    def _cmd_list_headers(self):
+    def _cmd_list_headers(self, *args):
         self.respond(ResponseCode.NNTP_INFORMATION_FOLLOWS, "metadata items supported")
 
         for name in self.SUPPORTED_HEADERS: