diff --git a/sherpa/models/regrid.py b/sherpa/models/regrid.py
index 09f43bd8ac..a49bc46a08 100644
--- a/sherpa/models/regrid.py
+++ b/sherpa/models/regrid.py
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*-
+from __future__ import division
 #  Copyright (C) 2017, 2018  Smithsonian Astrophysical Observatory
 #
 #