diff --git a/shared-bindings/msgpack/__init__.c b/shared-bindings/msgpack/__init__.c
index 59ff694bb8..ea1e430877 100644
--- a/shared-bindings/msgpack/__init__.c
+++ b/shared-bindings/msgpack/__init__.c
@@ -80,8 +80,7 @@
 //|    print(f"{data} -> {buffer.getvalue()} -> {decoded}")
 //| """
 
-
-//| def pack(obj: object, buffer: WriteableBuffer, *, default: Union[Callable[[object], None],None]=None) -> None:
+//| def pack(obj: object, buffer: WriteableBuffer, *, default: Union[Callable[[object], None], None] = None) -> None:
 //|     """Ouput object to buffer in msgpack format.
 //|     :param object obj: Object to convert to msgpack format.
 //|     :param ~_typing.WriteableBuffer buffer: buffer to write into
@@ -110,7 +109,8 @@ STATIC mp_obj_t mod_msgpack_pack(size_t n_args, const mp_obj_t *pos_args, mp_map
 }
 MP_DEFINE_CONST_FUN_OBJ_KW(mod_msgpack_pack_obj, 1, mod_msgpack_pack);
 
-//| def unpack(buffer: ReadableBuffer, *, ext_hook: Union[Callable[[int, bytes], object],None],None]=None, use_list: bool=True) -> object:
+
+//| def unpack(buffer: ReadableBuffer, *, ext_hook: Union[Callable[[int, bytes], object], None] = None, use_list: bool=True) -> object:
 //|     """Unpack and return one object from buffer.
 //|     :param ~_typing.ReadableBuffer buffer: buffer to read from
 //|     :param Optional[~_typing.Callable[[int, bytes], object]] ext_hook: function called for objects in