diff --git a/Lib/typing.py b/Lib/typing.py
index 9fa4c48b45e85a..306bb9fb6df784 100644
--- a/Lib/typing.py
+++ b/Lib/typing.py
@@ -427,6 +427,7 @@ def __iter__(self): raise TypeError()
     is treated specially.
     """
 
+    __slots__ = ()
     __iter__ = None