diff --git a/src/ol/geom/flat/geodesic.js b/src/ol/geom/flat/geodesic.js
index e91595161e..429d4695fa 100644
--- a/src/ol/geom/flat/geodesic.js
+++ b/src/ol/geom/flat/geodesic.js
@@ -1,5 +1,6 @@
 goog.provide('ol.geom.flat.geodesic');
 
+goog.require('ol');
 goog.require('ol.math');
 goog.require('ol.proj');