1 files changed, 4 insertions, 2 deletions
diff --git a/Python/executor_cases.c.h b/Python/executor_cases.c.h
index d6d541a3b61..a7b5054417e 100644
--- a/Python/executor_cases.c.h
+++ b/Python/executor_cases.c.h
@@ -1623,8 +1623,10 @@
             owner = stack_pointer[-1];
             assert(Py_TYPE(owner)->tp_dictoffset < 0);
             assert(Py_TYPE(owner)->tp_flags & Py_TPFLAGS_MANAGED_DICT);
-            PyDictOrValues dorv = *_PyObject_DictOrValuesPointer(owner);
-            DEOPT_IF(!_PyDictOrValues_IsValues(dorv), LOAD_ATTR);
+            PyDictOrValues *dorv = _PyObject_DictOrValuesPointer(owner);
+            DEOPT_IF(!_PyDictOrValues_IsValues(*dorv) &&
+                     !_PyObject_MakeInstanceAttributesFromDict(owner, dorv),
+                     LOAD_ATTR);
             break;
         }