diff --git a/Lib/typing.py b/Lib/typing.py
index 46ef2d9cf60056..d75203e7e06c32 100644
--- a/Lib/typing.py
+++ b/Lib/typing.py
@@ -417,6 +417,7 @@ def __iter__(self): raise TypeError()
     is treated specially.
     """
 
+    __slots__ = ()
     __iter__ = None