diff --git a/framework/assets/js/geolocation.js b/framework/assets/js/geolocation.js
index 19fb1ffa..fec7b884 100644
--- a/framework/assets/js/geolocation.js
+++ b/framework/assets/js/geolocation.js
@@ -29,7 +29,7 @@ Geolocation.prototype.gotCurrentPosition = function(lat, lng, alt, altacc, head,
   }
   else
   {
-    coords = new Coordinates(lat, lng, alt, altacc, head, vel);
+    coords = new Coordinates(lat, lng, alt, acc, head, vel);
     loc = new Position(coords, stamp);
 	this.lastPosition = loc;
     this.global_success(loc);
@@ -58,7 +58,7 @@ Geolocation.prototype.watchPosition = function(successCallback, errorCallback, o
  */
 Geolocation.prototype.success = function(key, lat, lng, alt, altacc, head, vel, stamp)
 {
-  var coords = new Coordinates(lat, lng, alt, altacc, head, vel);
+  var coords = new Coordinates(lat, lng, alt, acc, head, vel);
   var loc = new Position(coords, stamp);
   geoListeners[key].success(loc);
 }
diff --git a/framework/assets/js/position.js b/framework/assets/js/position.js
index d6a983fe..3371658a 100644
--- a/framework/assets/js/position.js
+++ b/framework/assets/js/position.js
@@ -14,7 +14,7 @@ function Position(coords, timestamp) {
         this.timestamp = new Date().getTime();
 }
 
-function Coordinates(lat, lng, alt, acc, head, vel) {
+function Coordinates(lat, lng, alt, acc, head, vel, altacc) {
 	/**
 	 * The latitude of the position.
 	 */
@@ -39,6 +39,10 @@ function Coordinates(lat, lng, alt, acc, head, vel) {
 	 * The velocity with which the device is moving at the position.
 	 */
 	this.speed = vel;
+	/**
+	 * The altitude accuracy of the position.
+	 */
+	this.altitudeAccuracy = (altacc == "undefined") ? altacc : null; 
 }
 
 /**