diff --git a/HEADER.js b/HEADER.js
index 55210589..d52f279c 100644
--- a/HEADER.js
+++ b/HEADER.js
@@ -26,7 +26,7 @@ else {
  * True when in environment that supports touch events
  * @type boolean
  */
-fabric.isTouchSupported = 'ontouchstart' in fabric.document.documentElement;
+fabric.isTouchSupported = 'ontouchstart' in fabric.window;
 
 /**
  * True when in environment that's probably Node.js