diff --git a/Doc/library/ast.rst b/Doc/library/ast.rst
@@ -126,7 +126,7 @@ The abstract grammar is currently defined as follows:
Apart from the node classes, the :mod:`ast` module defines these utility functions
and classes for traversing abstract syntax trees:

-.. function:: parse(source, filename='<unknown>', mode='exec', *, type_comments=False, feature_version=-1)

   Parse the source into an AST node.  Equivalent to ``compile(source,
   filename, mode, ast.PyCF_ONLY_AST)``.
@@ -145,11 +145,12 @@ and classes for traversing abstract syntax trees:
   modified to correspond to :pep:`484` "signature type comments",
   e.g. ``(str, int) -> List[str]``.

-   Also, setting ``feature_version`` to the minor version of an
-   earlier Python 3 version will attempt to parse using that version's
-   grammar.  For example, setting ``feature_version=4`` will allow
-   the use of ``async`` and ``await`` as variable names.  The lowest
-   supported value is 4; the highest is ``sys.version_info[1]``.

   .. warning::
      It is possible to crash the Python interpreter with a

diff --git a/Doc/whatsnew/3.8.rst b/Doc/whatsnew/3.8.rst
@@ -352,9 +352,9 @@ The :func:`ast.parse` function has some new flags:
* ``mode='func_type'`` can be used to parse :pep:`484` "signature type
  comments" (returned for function definition AST nodes);

-* ``feature_version=N`` allows specifying the minor version of an
-  earlier Python 3 version.  (For example, ``feature_version=4`` will
-  treat ``async`` and ``await`` as non-reserved words.)

New function :func:`ast.get_source_segment` returns the source code
for a specific AST node.

diff --git a/Lib/ast.py b/Lib/ast.py
@@ -28,7 +28,7 @@


def parse(source, filename='<unknown>', mode='exec', *,
-          type_comments=False, feature_version=-1):
    """
    Parse the source into an AST node.
    Equivalent to compile(source, filename, mode, PyCF_ONLY_AST).
@@ -37,6 +37,13 @@ def parse(source, filename='<unknown>', mode='exec', *,
    flags = PyCF_ONLY_AST
    if type_comments:
        flags |= PyCF_TYPE_COMMENTS
    return compile(source, filename, mode, flags,
                   feature_version=feature_version)