diff --git a/stdlib/3/os/__init__.pyi b/stdlib/3/os/__init__.pyi
index d20afacd9..bd2f97622 100644
--- a/stdlib/3/os/__init__.pyi
+++ b/stdlib/3/os/__init__.pyi
@@ -383,7 +383,16 @@ if sys.version_info >= (3, 3):
 else:
     def link(src: _PathType, link_name: _PathType) -> None: ...
 
-if sys.version_info >= (3, 3):
+if sys.version_info >= (3, 6):
+    @overload
+    def listdir(path: Optional[str] = ...) -> List[str]: ...
+    @overload
+    def listdir(path: bytes) -> List[bytes]: ...
+    @overload
+    def listdir(path: int) -> List[str]: ...
+    @overload
+    def listdir(path: PathLike[str]) -> List[str]: ...
+elif sys.version_info >= (3, 3):
     @overload
     def listdir(path: Optional[str] = ...) -> List[str]: ...
     @overload