diff --git a/Doc/library/argparse.rst b/Doc/library/argparse.rst
index fbffa71d200735..85aaff757145aa 100644
--- a/Doc/library/argparse.rst
+++ b/Doc/library/argparse.rst
@@ -2243,6 +2243,13 @@ remaining unparsed argument strings.
 
 .. versionadded:: 3.7
 
+Exceptions
+^^^^^^^^^^
+
+.. exception:: ArgumentTypeError
+
+    An error from trying to convert a command line string to a type
+
 .. _upgrading-optparse-code:
 
 Upgrading optparse code