diff --git a/lib/nntp/tiny/newsgroup.py b/lib/nntp/tiny/newsgroup.py
index 0ee902a..17e439a 100644
--- a/lib/nntp/tiny/newsgroup.py
+++ b/lib/nntp/tiny/newsgroup.py
@@ -1,6 +1,8 @@
 from nntp.tiny.db import DatabaseTable
 
 class Newsgroup(DatabaseTable):
+    __slots__ = 'id', 'created_on', 'name', 'description',
+
     name    = 'newsgroup'
     key     = 'id'
     columns = 'id', 'created_on', 'name', 'description',