diff --git a/Python/marshal.c b/Python/marshal.c
index 7d60614e712aef..2e911b7be27593 100644
--- a/Python/marshal.c
+++ b/Python/marshal.c
@@ -1860,6 +1860,9 @@ PyMarshal_Init(void)
     PyObject *mod = PyModule_Create(&marshalmodule);
     if (mod == NULL)
         return NULL;
-    PyModule_AddIntConstant(mod, "version", Py_MARSHAL_VERSION);
+    if (PyModule_AddIntConstant(mod, "version", Py_MARSHAL_VERSION) < 0) {
+        Py_DECREF(mod);
+        return NULL;
+    }
     return mod;
 }