Implement PEP 3121: new module initialization and finalization API.
diff --git a/Modules/_codecsmodule.c b/Modules/_codecsmodule.c
index efa4d80..96dfd56 100644
--- a/Modules/_codecsmodule.c
+++ b/Modules/_codecsmodule.c
@@ -1152,8 +1152,20 @@
     {NULL, NULL}		/* sentinel */
 };
 
+static struct PyModuleDef codecsmodule = {
+	PyModuleDef_HEAD_INIT,
+	"_codecs",
+	NULL,
+	-1,
+	_codecs_functions,
+	NULL,
+	NULL,
+	NULL,
+	NULL
+};
+
 PyMODINIT_FUNC
-init_codecs(void)
+PyInit__codecs(void)
 {
-    Py_InitModule("_codecs", _codecs_functions);
+	return PyModule_Create(&codecsmodule);
 }