diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst
index ec2fe968b73..608cb07cc8f 100644
--- a/Doc/library/stdtypes.rst
+++ b/Doc/library/stdtypes.rst
@@ -2665,6 +2665,16 @@ types, where they are relevant.  Some of these are not reported by the
 
    The name of the class or type.
 
+
+.. method:: class.__subclasses__
+
+   All classes keep a list of weak references to their immediate subclasses.
+   This method returns a list of all those references still alive.  Example::
+
+      >>> int.__subclasses__()
+      [<type 'bool'>]
+
+
 .. rubric:: Footnotes
 
 .. [#] Additional information on these special methods may be found in the Python