mention that bsddb3 can be gotten as a third party addon
diff --git a/Doc/library/dbm.rst b/Doc/library/dbm.rst
index 932c2a7..ed05921 100644
--- a/Doc/library/dbm.rst
+++ b/Doc/library/dbm.rst
@@ -5,9 +5,10 @@
:synopsis: Interfaces to various Unix "database" formats.
:mod:`dbm` is a generic interface to variants of the DBM database ---
-:mod:`dbm.bsd` (requires :mod:`bsddb`), :mod:`dbm.gnu`, or :mod:`dbm.ndbm`. If
-none of these modules is installed, the slow-but-simple implementation in module
-:mod:`dbm.dumb` will be used.
+ :mod:`dbm.gnu` or :mod:`dbm.ndbm`. If none of these modules is installed, the
+ slow-but-simple implementation in module :mod:`dbm.dumb` will be used. There
+ is a `third party interface <http://www.jcea.es/programacion/pybsddb.htm>`_ to
+ the Oracle Berkely DB.
.. exception:: error