diff --git a/src/utils/Sorter.js b/src/utils/Sorter.js
index 9392749cd..75d62210e 100644
--- a/src/utils/Sorter.js
+++ b/src/utils/Sorter.js
@@ -83,7 +83,7 @@ module.exports = Backbone.View.extend({
    * Triggered when the offset of the editro is changed
    */
   udpateOffset() {
-    var offset = this.em.get('canvasOffset');
+    const offset = this.em.get('canvasOffset') || {};
     this.offTop = offset.top;
     this.offLeft = offset.left;
   },