diff --git a/stdlib/encodings/cp1252.pyi b/stdlib/encodings/cp1252.pyi
index f62195662ce9..2924e73c3543 100644
--- a/stdlib/encodings/cp1252.pyi
+++ b/stdlib/encodings/cp1252.pyi
@@ -4,7 +4,7 @@ from _typeshed import ReadableBuffer
 
 class Codec(codecs.Codec):
     def encode(self, input: str, errors: str = "strict") -> tuple[bytes, int]: ...
-    def decode(self, input: bytes, errors: str = "strict") -> tuple[str, int]: ...
+    def decode(self, input: ReadableBuffer, errors: str = "strict") -> tuple[str, int]: ...
 
 class IncrementalEncoder(codecs.IncrementalEncoder):
     def encode(self, input: str, final: bool = False) -> bytes: ...