diff --git a/Lib/robotparser.py b/Lib/robotparser.py
index e0ff72b..782d623 100644
--- a/Lib/robotparser.py
+++ b/Lib/robotparser.py
@@ -11,6 +11,8 @@
 """
 import re,string,urlparse,urllib
 
+__all__ = ["RobotFileParser"]
+
 debug = 0
 
 def _debug(msg):