diff --git a/src/game-lib-system-input.js b/src/game-lib-system-input.js
index 073ae38..5d77617 100644
--- a/src/game-lib-system-input.js
+++ b/src/game-lib-system-input.js
@@ -617,27 +617,27 @@ GameLib.System.Input.prototype.onTouchMove = function (event) {
 
             if (this.touches[id]) {
 
-                var diffX = Math.abs(this.touches[id].lastTouchX - event.changedTouches[id].pageX);
-                var diffY = Math.abs(this.touches[id].lastTouchY - event.changedTouches[id].pageY);
+                var diffX = Math.abs(this.touches[id].lastTouchX - event.changedTouches[t].pageX);
+                var diffY = Math.abs(this.touches[id].lastTouchY - event.changedTouches[t].pageY);
 
                 var left = 0;
                 var right = 0;
                 var up = 0;
                 var down = 0;
 
-                if (this.touches[id].lastTouchX < event.changedTouches[id].pageX) {
+                if (this.touches[id].lastTouchX < event.changedTouches[t].pageX) {
                     right += diffX;
                 }
 
-                if (this.touches[id].lastTouchX > event.changedTouches[id].pageX) {
+                if (this.touches[id].lastTouchX > event.changedTouches[t].pageX) {
                     left += diffX;
                 }
 
-                if (this.touches[id].lastTouchY > event.changedTouches[id].pageY) {
+                if (this.touches[id].lastTouchY > event.changedTouches[t].pageY) {
                     up += diffY;
                 }
 
-                if (this.touches[id].lastTouchY < event.changedTouches[id].pageY) {
+                if (this.touches[id].lastTouchY < event.changedTouches[t].pageY) {
                     down += diffY;
                 }
 
@@ -645,8 +645,8 @@ GameLib.System.Input.prototype.onTouchMove = function (event) {
                 this.touches[id].left = left;
                 this.touches[id].up = up;
                 this.touches[id].down = down;
-                this.touches[id].lastTouchX = event.changedTouches[id].pageX;
-                this.touches[id].lastTouchY = event.changedTouches[id].pageY;
+                this.touches[id].lastTouchX = event.changedTouches[t].pageX;
+                this.touches[id].lastTouchY = event.changedTouches[t].pageY;
                 this.touches[id].pageX = event.changedTouches[t].pageX;
                 this.touches[id].pageY = event.changedTouches[t].pageY;
             }