diff --git a/third_party/2and3/google/protobuf/message.pyi b/third_party/2and3/google/protobuf/message.pyi
index caa6ff14b..b164a7621 100644
--- a/third_party/2and3/google/protobuf/message.pyi
+++ b/third_party/2and3/google/protobuf/message.pyi
@@ -23,7 +23,7 @@ class Message:
     def ListFields(self) -> Sequence[Tuple[FieldDescriptor, Any]]: ...
     def HasField(self, field_name: Text) -> bool: ...
     def ClearField(self, field_name: Text) -> None: ...
-    def WhichOneof(self, oneof_group) -> Optional[bytes]: ...
+    def WhichOneof(self, oneof_group) -> Optional[Text]: ...
     def HasExtension(self, extension_handle): ...
     def ClearExtension(self, extension_handle): ...
     def ByteSize(self) -> int: ...