diff --git a/stdlib/2and3/threading.pyi b/stdlib/2and3/threading.pyi
index 2b81bbe8f..bcb7c862a 100644
--- a/stdlib/2and3/threading.pyi
+++ b/stdlib/2and3/threading.pyi
@@ -76,6 +76,10 @@ class Thread:
     def setDaemon(self, daemonic: bool) -> None: ...
 
 
+class _DummyThread(Thread):
+    pass
+
+
 class Lock:
     def __init__(self) -> None: ...
     def __enter__(self) -> bool: ...
@@ -89,7 +93,7 @@ class Lock:
     def release(self) -> None: ...
 
 
-class RLock:
+class _RLock:
     def __init__(self) -> None: ...
     def __enter__(self) -> bool: ...
     def __exit__(self, exc_type: Optional[Type[BaseException]],
@@ -102,8 +106,11 @@ class RLock:
     def release(self) -> None: ...
 
 
+def RLock() -> _RLock: ...
+
+
 class Condition:
-    def __init__(self, lock: Union[Lock, RLock, None] = ...) -> None: ...
+    def __init__(self, lock: Union[Lock, _RLock, None] = ...) -> None: ...
     def __enter__(self) -> bool: ...
     def __exit__(self, exc_type: Optional[Type[BaseException]],
                  exc_val: Optional[Exception],