diff --git a/Lib/ast.py b/Lib/ast.py
index e46ab43..703f68a 100644
--- a/Lib/ast.py
+++ b/Lib/ast.py
@@ -27,7 +27,7 @@
 import sys
 from _ast import *
 from contextlib import contextmanager, nullcontext
-from enum import IntEnum, auto
+from enum import IntEnum, auto, _simple_enum
 
 
 def parse(source, filename='<unknown>', mode='exec', *,
@@ -636,7 +636,8 @@ class Param(expr_context):
 # We unparse those infinities to INFSTR.
 _INFSTR = "1e" + repr(sys.float_info.max_10_exp + 1)
 
-class _Precedence(IntEnum):
+@_simple_enum(IntEnum)
+class _Precedence:
     """Precedence table that originated from python grammar."""
 
     TUPLE = auto()