1 files changed, 2 insertions, 1 deletions
diff --git a/Python/executor_cases.c.h b/Python/executor_cases.c.h
index 29160b9f663..94f05c62089 100644
--- a/Python/executor_cases.c.h
+++ b/Python/executor_cases.c.h
@@ -1522,7 +1522,8 @@
             }
             STAT_INC(STORE_SUBSCR, hit);
             PyObject *old_value = PyList_GET_ITEM(list, index);
-            PyList_SET_ITEM(list, index, PyStackRef_AsPyObjectSteal(value));
+            FT_ATOMIC_STORE_PTR_RELEASE(_PyList_ITEMS(list)[index],
+                                        PyStackRef_AsPyObjectSteal(value));
             assert(old_value != NULL);
             UNLOCK_OBJECT(list);  // unlock before decrefs!
             PyStackRef_CLOSE_SPECIALIZED(sub_st, _PyLong_ExactDealloc);