diff -ru python3.orig/Include/modsupport.h python3/Include/modsupport.h
--- python3.orig/Include/modsupport.h	2015-07-05 18:50:06.000000000 +0200
+++ python3/Include/modsupport.h	2015-07-26 18:21:30.717680314 +0200
@@ -26,7 +26,11 @@
 /* Due to a glitch in 3.2, the _SizeT versions weren't exported from the DLL. */
 #if !defined(PY_SSIZE_T_CLEAN) || !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x03030000
 PyAPI_FUNC(int) PyArg_Parse(PyObject *, const char *, ...);
-PyAPI_FUNC(int) PyArg_ParseTuple(PyObject *, const char *, ...);
+PyAPI_FUNC(int) PyArg_ParseTuple(PyObject *, const char *, ...)
+#ifdef PY_SSIZE_T_CLEAN
+    Py_FORMAT_PARSETUPLE(PyArg_ParseTuple, 2, 3)
+#endif
+    ;
 PyAPI_FUNC(int) PyArg_ParseTupleAndKeywords(PyObject *, PyObject *,
                                                   const char *, char **, ...);
 PyAPI_FUNC(int) PyArg_ValidateKeywordArguments(PyObject *);
