diff --git a/Doc/library/argparse.rst b/Doc/library/argparse.rst
index 51abc7a9096..b1b5135eac1 100644
--- a/Doc/library/argparse.rst
+++ b/Doc/library/argparse.rst
@@ -1671,6 +1671,9 @@ FileType objects
       >>> parser.parse_args(['-'])
       Namespace(infile=<_io.TextIOWrapper name='<stdin>' encoding='UTF-8'>)
 
+   .. versionadded:: 3.4
+      The *encodings* and *errors* keyword arguments.
+
 
 Argument groups
 ^^^^^^^^^^^^^^^
diff --git a/Doc/whatsnew/3.4.rst b/Doc/whatsnew/3.4.rst
index 5b682439450..19d71ccbf1d 100644
--- a/Doc/whatsnew/3.4.rst
+++ b/Doc/whatsnew/3.4.rst
@@ -495,6 +495,14 @@ The :meth:`~aifc.getparams` method now returns a namedtuple rather than a
 plain tuple.  (Contributed by Claudiu Popa in :issue:`17818`.)
 
 
+argparse
+--------
+
+The :class:`~argparse.FileType` class now accepts *encoding* and
+*errors* arguments, which are passed through to :func:`open`.  (Contributed
+by Lucas Maystre in :issue:`11175`.)
+
+
 audioop
 -------