diff --git a/mercurial/cext/parsers.c b/mercurial/cext/parsers.c
--- a/mercurial/cext/parsers.c
+++ b/mercurial/cext/parsers.c
@@ -944,6 +944,8 @@ static void module_init(PyObject *mod)
 	manifest_module_init(mod);
 	revlog_module_init(mod);
 
+	if (PyType_Ready(&dirstateTupleType) < 0)
+		return;
 	Py_INCREF(&dirstateTupleType);
 	PyModule_AddObject(mod, "dirstatetuple",
 			   (PyObject *)&dirstateTupleType);
diff --git a/mercurial/cext/revlog.c b/mercurial/cext/revlog.c
--- a/mercurial/cext/revlog.c
+++ b/mercurial/cext/revlog.c
@@ -1930,8 +1930,7 @@ bail:
 void revlog_module_init(PyObject *mod)
 {
 	indexType.tp_new = PyType_GenericNew;
-	if (PyType_Ready(&indexType) < 0 ||
-	    PyType_Ready(&dirstateTupleType) < 0)
+	if (PyType_Ready(&indexType) < 0)
 		return;
 	Py_INCREF(&indexType);
 	PyModule_AddObject(mod, "index", (PyObject *)&indexType);