diff --git a/src/ol/sphere/sphere.js b/src/ol/sphere/sphere.js
index 0b647d0b9f..825d843263 100644
--- a/src/ol/sphere/sphere.js
+++ b/src/ol/sphere/sphere.js
@@ -54,7 +54,6 @@ ol.Sphere.prototype.cosineDistance = function(c1, c2) {
  * @return {number} Cross-track distance.
  */
 ol.Sphere.prototype.crossTrackDistance = function(c1, c2, c3) {
-  var d12 = this.cosineDistance(c1, c2);
   var d13 = this.cosineDistance(c1, c2);
   var theta12 = goog.math.toRadians(this.initialBearing(c1, c2));
   var theta13 = goog.math.toRadians(this.initialBearing(c1, c3));