diff --git a/stdlib/3/builtins.pyi b/stdlib/3/builtins.pyi
index d417bce3b..1fb9f2b07 100644
--- a/stdlib/3/builtins.pyi
+++ b/stdlib/3/builtins.pyi
@@ -298,7 +298,7 @@ class bytes(ByteString):
     @classmethod
     def fromhex(cls, s: str) -> bytes: ...
     @classmethod
-    def maketrans(cls, frm: ByteString, to: ByteString) -> bytes: ...
+    def maketrans(cls, frm: bytes, to: bytes) -> bytes: ...
 
     def __len__(self) -> int: ...
     def __iter__(self) -> Iterator[int]: ...
@@ -371,7 +371,7 @@ class bytearray(MutableSequence[int], ByteString):
     @classmethod
     def fromhex(cls, s: str) -> bytearray: ...
     @classmethod
-    def maketrans(cls, frm: ByteString, to: ByteString) -> bytes: ...
+    def maketrans(cls, frm: bytes, to: bytes) -> bytes: ...
 
     def __len__(self) -> int: ...
     def __iter__(self) -> Iterator[int]: ...