diff --git a/Doc/c-api/object.rst b/Doc/c-api/object.rst
index 2109b12bac9090..cefd384fd35a1f 100644
--- a/Doc/c-api/object.rst
+++ b/Doc/c-api/object.rst
@@ -410,6 +410,12 @@ Object Protocol
    iterated.
 
 
+.. c:function:: PyObject* PyObject_SelfIter(PyObject *obj)
+
+   This is equivalent to the Python ``__iter__(self): return self`` method.
+   It is intended for :term:`iterator` types, to be used in the :c:member:`PyTypeObject.tp_iter` slot.
+
+
 .. c:function:: PyObject* PyObject_GetAIter(PyObject *o)
 
    This is the equivalent to the Python expression ``aiter(o)``. Takes an
diff --git a/Doc/data/refcounts.dat b/Doc/data/refcounts.dat
index 28532620ba603d..88d283aa51e998 100644
--- a/Doc/data/refcounts.dat
+++ b/Doc/data/refcounts.dat
@@ -1818,6 +1818,9 @@ PyObject_RichCompareBool:PyObject*:o1:0:
 PyObject_RichCompareBool:PyObject*:o2:0:
 PyObject_RichCompareBool:int:opid::
 
+PyObject_SelfIter:PyObject*::+1:
+PyObject_SelfIter:PyObject*:obj:0:
+
 PyObject_SetAttr:int:::
 PyObject_SetAttr:PyObject*:o:0:
 PyObject_SetAttr:PyObject*:attr_name:0: