diff --git a/Doc/library/constants.rst b/Doc/library/constants.rst
index c0ac4ea8412ebd..645ae77b1bb0f8 100644
--- a/Doc/library/constants.rst
+++ b/Doc/library/constants.rst
@@ -70,6 +70,15 @@ A small number of constants live in the built-in namespace.  They are:
    ``Ellipsis`` is the sole instance of the :data:`types.EllipsisType` type.
 
 
+.. data:: TYPE_CHECKING
+
+   This constant is same to :data:`typing.TYPE_CHECKING`.
+   It is always ``False`` at runtime, but third party static type checkers
+   assumes it to be ``True``.
+
+   .. versionadded:: next
+
+
 .. data:: __debug__
 
    This constant is true if Python was not started with an :option:`-O` option.
diff --git a/Python/bltinmodule.c b/Python/bltinmodule.c
index 6709f306bb024d..f0422680fa625d 100644
--- a/Python/bltinmodule.c
+++ b/Python/bltinmodule.c
@@ -3407,6 +3407,7 @@ _PyBuiltin_Init(PyInterpreterState *interp)
     SETBUILTIN("tuple",                 &PyTuple_Type);
     SETBUILTIN("type",                  &PyType_Type);
     SETBUILTIN("zip",                   &PyZip_Type);
+    SETBUILTIN("TYPE_CHECKING",         Py_False);
     debug = PyBool_FromLong(config->optimization_level == 0);
     if (PyDict_SetItemString(dict, "__debug__", debug) < 0) {
         Py_DECREF(debug);