diff --git a/scripts/geodata/distance/haversine.py b/scripts/geodata/distance/haversine.py
index 576aaecf..309deef3 100644
--- a/scripts/geodata/distance/haversine.py
+++ b/scripts/geodata/distance/haversine.py
@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 import math
 
 EARTH_RADIUS_KM = 6373