diff --git a/doc/reference.rst b/doc/reference.rst
index 57d9b429..d0f112d2 100644
--- a/doc/reference.rst
+++ b/doc/reference.rst
@@ -30,6 +30,7 @@ Top level classes
 .. autoclass:: cparams
    :members: setdefaults
 
+.. autoclass:: bcolz.attrs.attrs
 
 Also, see the :py:class:`carray` and :py:class:`ctable` classes below.