diff --git a/Doc/library/exceptions.rst b/Doc/library/exceptions.rst
index a50ffbf..0b4c668 100644
--- a/Doc/library/exceptions.rst
+++ b/Doc/library/exceptions.rst
@@ -84,9 +84,9 @@
 
 .. exception:: LookupError
 
-   The base class for the exceptions that are raised when a key or index used on a
-   mapping or sequence is invalid: :exc:`IndexError`, :exc:`KeyError`.  This can be
-   raised directly by :func:`sys.setdefaultencoding`.
+   The base class for the exceptions that are raised when a key or index used on
+   a mapping or sequence is invalid: :exc:`IndexError`, :exc:`KeyError`.  This
+   can be raised directly by :func:`codecs.lookup`.
 
 
 .. exception:: EnvironmentError