diff --git a/mercurial/cext/revlog.c b/mercurial/cext/revlog.c
--- a/mercurial/cext/revlog.c
+++ b/mercurial/cext/revlog.c
@@ -498,7 +498,7 @@ static int check_filter(PyObject *filter
 			return -1;
 		}
 
-		result = PyEval_CallObject(filter, arglist);
+		result = PyObject_Call(filter, arglist, NULL);
 		Py_DECREF(arglist);
 		if (!result) {
 			return -1;