diff --git a/Doc/extending/newtypes_tutorial.rst b/Doc/extending/newtypes_tutorial.rst
index 94ca747c7aeb85..b2c819c8582376 100644
--- a/Doc/extending/newtypes_tutorial.rst
+++ b/Doc/extending/newtypes_tutorial.rst
@@ -182,7 +182,7 @@ set to *NULL*. ::
    Py_INCREF(&CustomType);
    if (PyModule_AddObject(m, "Custom", (PyObject *) &CustomType) < 0) {
        Py_DECREF(&CustomType);
-       PY_DECREF(m);
+       Py_DECREF(m);
        return NULL;
    }