c-api: Replace PyUnicodeObject* by PyObject* in "U" format doc
diff --git a/Doc/c-api/arg.rst b/Doc/c-api/arg.rst
index a171ac7..196aa77 100644
--- a/Doc/c-api/arg.rst
+++ b/Doc/c-api/arg.rst
@@ -146,7 +146,7 @@
Like ``u#``, but the Python object may also be ``None``, in which case the
:c:type:`Py_UNICODE` pointer is set to *NULL*.
-``U`` (:class:`str`) [PyUnicodeObject \*]
+``U`` (:class:`str`) [PyObject \*]
Requires that the Python object is a Unicode object, without attempting
any conversion. Raises :exc:`TypeError` if the object is not a Unicode
object. The C variable may also be declared as :c:type:`PyObject\*`.