diff --git a/MultiMethod_PathTracing.html b/MultiMethod_PathTracing.html
index ff6c0502..2664a17c 100644
--- a/MultiMethod_PathTracing.html
+++ b/MultiMethod_PathTracing.html
@@ -554,7 +554,7 @@
 		     // function init( meshes ) {
 			function init() {
 				
-				if ( 'createTouch' in document ) {
+				if ( 'ontouchstart' in window ) {
 					mouseControl = false;
 					pixelRatio = 0.5;