1 files changed, 9 insertions, 0 deletions
diff --git a/Lib/typing.py b/Lib/typing.py
index 530d4633fe..7aab1628a3 100644
--- a/Lib/typing.py
+++ b/Lib/typing.py
@@ -74,6 +74,7 @@ __all__ = [
     'SupportsBytes',
     'SupportsComplex',
     'SupportsFloat',
+    'SupportsIndex',
     'SupportsInt',
     'SupportsRound',
 
@@ -1304,6 +1305,14 @@ class SupportsBytes(_Protocol):
         pass
 
 
+class SupportsIndex(_Protocol):
+    __slots__ = ()
+
+    @abstractmethod
+    def __index__(self) -> int:
+        pass
+
+
 class SupportsAbs(_Protocol[T_co]):
     __slots__ = ()