diff --git a/Doc/c-api/structures.rst b/Doc/c-api/structures.rst
--- a/Doc/c-api/structures.rst
+++ b/Doc/c-api/structures.rst
@@ -282,3 +282,18 @@
    read-only access.  Using :c:macro:`T_STRING` for :attr:`type` implies
    :c:macro:`READONLY`.  Only :c:macro:`T_OBJECT` and :c:macro:`T_OBJECT_EX`
    members can be deleted.  (They are set to *NULL*).
+
+.. c:function:: PyObject* PyCFunction_NewEx(PyMethodDef *ml, PyObject *self, PyObject *module)
+
+   Create a new :c:type:`PyCFunctionObject` object.  *ml* points to a
+   :c:type:`PyMethodDef` describing the C function that will be
+   called.  *self* is a :c:type:`PyObject` that will be passed as
+   *self* to the C function, and can be *NULL*.  *module* will be set
+   as the :attr:`__module__` attribute of the :c:type:`PyCFunction`
+   object and can also be *NULL*.
+
+.. c:function:: PyObject* PyCFunction_New(PyMethodDef *ml, PyObject *self)
+
+   A variant of :c:func:`PyCFunction_NewEx` that takes *ml* and
+   *self*, but sets the :attr:`__module__` attribute of the resulting
+   :c:type:`PyCFunctionObject` to *NULL*.