diff --git a/tools/python/apixml2python/handwritten_definitions.mustache b/tools/python/apixml2python/handwritten_definitions.mustache
index 4aab9c78d..a4b3e579f 100644
--- a/tools/python/apixml2python/handwritten_definitions.mustache
+++ b/tools/python/apixml2python/handwritten_definitions.mustache
@@ -104,12 +104,11 @@ static PyObject * pylinphone_module_method_set_log_handler(PyObject *self, PyObj
 	if (!PyArg_ParseTuple(args, "O", &callback)) {
 		return NULL;
 	}
-	if (!PyCallable_Check(callback)) {
-		PyErr_SetString(PyExc_TypeError, "The argument must be a callable");
+	if (!PyCallable_Check(callback) && (callback != Py_None)) {
+		PyErr_SetString(PyExc_TypeError, "The argument must be a callable or None");
 		return NULL;
 	}
 	if (linphone_module != NULL) {
-		Py_INCREF(callback);
 		PyObject_SetAttrString(linphone_module, "__log_handler", callback);
 		Py_DECREF(linphone_module);
 	}