Fix-up docs for the copyreg module renaming.
diff --git a/Doc/library/copy.rst b/Doc/library/copy.rst
index 89b668d..ce127a3 100644
--- a/Doc/library/copy.rst
+++ b/Doc/library/copy.rst
@@ -63,7 +63,7 @@
Classes can use the same interfaces to control copying that they use to control
pickling. See the description of module :mod:`pickle` for information on these
-methods. The :mod:`copy` module does not use the :mod:`copy_reg` registration
+methods. The :mod:`copy` module does not use the :mod:`copyreg` registration
module.
.. index::