1 files changed, 8 insertions, 4 deletions
diff --git a/babel/messages/mofile.py b/babel/messages/mofile.py
index 8284574..a96f059 100644
--- a/babel/messages/mofile.py
+++ b/babel/messages/mofile.py
@@ -7,18 +7,22 @@
     :copyright: (c) 2013-2022 by the Babel Team.
     :license: BSD, see LICENSE for more details.
 """
+from __future__ import annotations
 
 import array
 import struct
+from typing import TYPE_CHECKING
 
 from babel.messages.catalog import Catalog, Message
 
+if TYPE_CHECKING:
+    from _typeshed import SupportsRead, SupportsWrite
 
-LE_MAGIC = 0x950412de
-BE_MAGIC = 0xde120495
+LE_MAGIC: int = 0x950412de
+BE_MAGIC: int = 0xde120495
 
 
-def read_mo(fileobj):
+def read_mo(fileobj: SupportsRead[bytes]) -> Catalog:
     """Read a binary MO file from the given file-like object and return a
     corresponding `Catalog` object.
 
@@ -102,7 +106,7 @@ def read_mo(fileobj):
     return catalog
 
 
-def write_mo(fileobj, catalog, use_fuzzy=False):
+def write_mo(fileobj: SupportsWrite[bytes], catalog: Catalog, use_fuzzy: bool = False) -> None:
     """Write a catalog to the specified file-like object using the GNU MO file
     format.