diff --git a/CHANGES.rst b/CHANGES.rst
index 478a20ed0..455cc2c42 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -24,6 +24,16 @@ Version 2.2.0
     functions from wsgi.py. :pr:`2415`
 
 
+Version 2.1.3
+-------------
+
+Unreleased
+
+-   Add ``os.PathLike`` as a supported type for
+    ``werkzeug.datastructures.FileStorage`` in the typing information
+    file. It was already supported by the code. :pr:`2418`
+
+
 Version 2.1.2
 -------------
 
diff --git a/docs/datastructures.rst b/docs/datastructures.rst
index 10e3715e2..01432f413 100644
--- a/docs/datastructures.rst
+++ b/docs/datastructures.rst
@@ -122,7 +122,8 @@ Others
 
    .. attribute:: filename
 
-      The filename of the file on the client.
+      The filename of the file on the client. Can be a ``str``, or an
+      instance of ``os.PathLike``.
 
    .. attribute:: name
 
diff --git a/src/werkzeug/datastructures.pyi b/src/werkzeug/datastructures.pyi
index 6050f3508..7bf729789 100644
--- a/src/werkzeug/datastructures.pyi
+++ b/src/werkzeug/datastructures.pyi
@@ -896,7 +896,7 @@ class FileStorage:
     def __init__(
         self,
         stream: Optional[IO[bytes]] = None,
-        filename: Optional[str] = None,
+        filename: Union[str, PathLike, None] = None,
         name: Optional[str] = None,
         content_type: Optional[str] = None,
         content_length: Optional[int] = None,