diff --git a/lib/nntp/tiny/session.py b/lib/nntp/tiny/session.py
index 6b129c3..12918e9 100644
--- a/lib/nntp/tiny/session.py
+++ b/lib/nntp/tiny/session.py
@@ -849,8 +849,7 @@ class Session(Connection):
         try:
             return fn(self, *args)
         except TypeError as e:
-            traceback.print_exception(e)
-            return self.respond(ResponseCode.NNTP_SYNTAX_ERROR)
+            return self.respond(ResponseCode.NNTP_SYNTAX_ERROR, str(e))
         except Exception as e:
             traceback.print_exception(e)
             return self.respond(ResponseCode.NNTP_COMMAND_UNAVAILABLE)