Issue #13072: The array module's 'u' format code is now deprecated and
will be removed in Python 4.0.
diff --git a/Doc/library/array.rst b/Doc/library/array.rst
index 2eb926c..8f6943a 100644
--- a/Doc/library/array.rst
+++ b/Doc/library/array.rst
@@ -47,10 +47,15 @@
 Notes:
 
 (1)
-   The ``'u'`` type code corresponds to Python's unicode character
+   The ``'u'`` type code corresponds to Python's obsolete unicode character
    (:c:type:`Py_UNICODE` which is :c:type:`wchar_t`). Depending on the
    platform, it can be 16 bits or 32 bits.
 
+   ``'u'`` will be removed together with the rest of the :c:type:`Py_UNICODE`
+   API.
+
+   .. deprecated-removed:: 3.3 4.0
+
 (2)
    The ``'q'`` and ``'Q'`` type codes are available only if
    the platform C compiler used to build Python supports C :c:type:`long long`,