diff --git a/Doc/library/urllib.request.rst b/Doc/library/urllib.request.rst
index 17e33795f3b9a0..50a5249fd16bd3 100644
--- a/Doc/library/urllib.request.rst
+++ b/Doc/library/urllib.request.rst
@@ -1490,7 +1490,8 @@ some point in the future.
 .. function:: urlcleanup()
 
    Cleans up temporary files that may have been left behind by previous
-   calls to :func:`urlretrieve`.
+   calls to :func:`urlretrieve`.  It also resets the default global opener
+   installed by :func:`install_opener`.
 
 
 :mod:`!urllib.request` Restrictions