diff --git a/Objects/typeobject.c b/Objects/typeobject.c
index c1bae0b9a6d62f..d95b850699ed8e 100644
--- a/Objects/typeobject.c
+++ b/Objects/typeobject.c
@@ -6512,8 +6512,11 @@ add_subclass(PyTypeObject *base, PyTypeObject *type)
PyObject *subclasses = base->tp_subclasses;
if (subclasses == NULL) {
base->tp_subclasses = subclasses = PyDict_New();
- if (subclasses == NULL)
+ if (subclasses == NULL) {
+ Py_DECREF(key);
+ Py_DECREF(ref);
return -1;
+ }
}
assert(PyDict_CheckExact(subclasses));
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