diff --git a/stdlib/tokenize.pyi b/stdlib/tokenize.pyi
index 6f242a6cd..7c00b507a 100644
--- a/stdlib/tokenize.pyi
+++ b/stdlib/tokenize.pyi
@@ -122,8 +122,8 @@ class Untokenizer:
 # the docstring says "returns bytes" but is incorrect --
 # if the ENCODING token is missing, it skips the encode
 def untokenize(iterable: Iterable[_Token]) -> Any: ...
-def detect_encoding(readline: Callable[[], bytes]) -> tuple[str, Sequence[bytes]]: ...
-def tokenize(readline: Callable[[], bytes]) -> Generator[TokenInfo, None, None]: ...
+def detect_encoding(readline: Callable[[], bytes | bytearray]) -> tuple[str, Sequence[bytes]]: ...
+def tokenize(readline: Callable[[], bytes | bytearray]) -> Generator[TokenInfo, None, None]: ...
 def generate_tokens(readline: Callable[[], str]) -> Generator[TokenInfo, None, None]: ...  # undocumented
 def open(filename: StrOrBytesPath | int) -> TextIO: ...
 def group(*choices: str) -> str: ...  # undocumented