diff --git a/src/ol/sphere/wgs84.js b/src/ol/sphere/wgs84.js
new file mode 100644
index 0000000000..e30aafeb4b
--- /dev/null
+++ b/src/ol/sphere/wgs84.js
@@ -0,0 +1,10 @@
+goog.provide('ol.sphere.WGS84');
+
+goog.require('ol.Sphere');
+
+
+/**
+ * A sphere with radius equal to the semi-major axis of the WGS84 ellipsoid.
+ * @const {ol.Sphere}
+ */
+ol.sphere.WGS84 = new ol.Sphere(6378137);