diff --git a/stdlib/3/threading.pyi b/stdlib/3/threading.pyi
index 57676b30c..a3e2597ba 100644
--- a/stdlib/3/threading.pyi
+++ b/stdlib/3/threading.pyi
@@ -54,3 +54,8 @@ class Condition:
     def wait_for(self, predicate: Callable[[], _T], timeout: float = ...) -> Union[_T, bool]: ...
     def __enter__(self) -> bool: ...
     def __exit__(self, *args): ...
+
+class Timer(Thread):
+    def __init__(self, interval: float, function: Callable[..., Any],
+                 args: Any = ..., kwargs: Dict[Any, Any] = ...) -> None: ...
+    def cancel(self) -> None : ...