diff --git a/stdlib/2and3/shutil.pyi b/stdlib/2and3/shutil.pyi
index 878f903cf..a6ae9c588 100644
--- a/stdlib/2and3/shutil.pyi
+++ b/stdlib/2and3/shutil.pyi
@@ -117,8 +117,13 @@ if sys.version_info >= (3,):
     def disk_usage(path: _Path) -> _ntuple_diskusage: ...
     def chown(path: _Path, user: Optional[str] = ...,
               group: Optional[str] = ...) -> None: ...
-    def which(cmd: _Path, mode: int = ...,
-              path: Optional[_Path] = ...) -> Optional[str]: ...
+if sys.version_info >= (3, 8):
+    @overload
+    def which(cmd: _Path, mode: int = ..., path: Optional[_Path] = ...) -> Optional[str]: ...
+    @overload
+    def which(cmd: bytes, mode: int = ..., path: Optional[_Path] = ...) -> Optional[bytes]: ...
+elif sys.version_info >= (3,):
+    def which(cmd: _Path, mode: int = ..., path: Optional[_Path] = ...) -> Optional[str]: ...
 
 def make_archive(base_name: _AnyStr, format: str, root_dir: Optional[_Path] = ...,
                  base_dir: Optional[_Path] = ..., verbose: bool = ...,