From a3d69472e212fa3b6ab842a303e1bafa81a9bfd5 Mon Sep 17 00:00:00 2001
From: Brian Schubert <brianm.schubert@gmail.com>
Date: Sat, 21 Feb 2026 13:03:39 -0500
Subject: [PATCH] [pickle] Fix value of `pickle.DEFAULT_PROTOCOL` for Python
 <3.14 (#15446)

---
 stdlib/pickle.pyi | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/stdlib/pickle.pyi b/stdlib/pickle.pyi
index d94fe208f..0f486b1d0 100644
--- a/stdlib/pickle.pyi
+++ b/stdlib/pickle.pyi
@@ -1,3 +1,4 @@
+import sys
 from _pickle import (
     PickleError as PickleError,
     Pickler as Pickler,
@@ -103,7 +104,10 @@ __all__ = [
 ]
 
 HIGHEST_PROTOCOL: Final = 5
-DEFAULT_PROTOCOL: Final = 5
+if sys.version_info >= (3, 14):
+    DEFAULT_PROTOCOL: Final = 5
+else:
+    DEFAULT_PROTOCOL: Final = 4
 
 bytes_types: tuple[type[Any], ...]  # undocumented