diff --git a/src/behaviours/trackpad-scrolling.js b/src/behaviours/trackpad-scrolling.js
index e6fd297e5bb09a46ae1ff706eda3451e74b26b63..da7652bb0d2928c8a9b06df349f075dc41d472c8 100644
--- a/src/behaviours/trackpad-scrolling.js
+++ b/src/behaviours/trackpad-scrolling.js
@@ -7,7 +7,7 @@ function trackpad_scrolling(el) {
   this.x = 0;
   this.y = 0;
   this.axis = [0, 0];
-  this.emittedEventDetail = { axis: this.axis };
+  this.emittedEventDetail = { detail: { axis: this.axis } };
 
   this.onStart = this.onStart.bind(this);
   this.onMove = this.onMove.bind(this);