diff --git a/Doc/using/cmdline.rst b/Doc/using/cmdline.rst
index 7c9b511..540e4d7 100644
--- a/Doc/using/cmdline.rst
+++ b/Doc/using/cmdline.rst
@@ -238,8 +238,6 @@
    See also :envvar:`PYTHONUNBUFFERED`.
 
 
-.. XXX should the -U option be documented?
-
 .. cmdoption:: -v
 
    Print a message each time a module is initialized, showing the place
@@ -315,6 +313,20 @@
 
    .. note:: The line numbers in error messages will be off by one.
 
+Options you shouldn't use
+~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. cmdoption:: -J
+
+   Reserved for use by Jython_.
+
+.. _Jython: http://jython.org
+
+.. cmdoption:: -X
+
+    Reserved for alternative implementations of Python to use for their own
+    purposes.
+
 .. _using-on-envvars:
 
 Environment variables
diff --git a/Misc/NEWS b/Misc/NEWS
index 9b72293..badfbad 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -378,6 +378,9 @@
 Documentation
 -------------
 
+- Updating `Using Python` documentation to include description of CPython's
+  -J and -X options.
+
 - Issue #6556: Fixed the Distutils configuration files location explanation
   for Windows.