diff --git a/src/ol/interaction/mousewheelzoominteraction.js b/src/ol/interaction/mousewheelzoominteraction.js
index 956c82d315..43834a5db2 100644
--- a/src/ol/interaction/mousewheelzoominteraction.js
+++ b/src/ol/interaction/mousewheelzoominteraction.js
@@ -83,7 +83,7 @@ ol.interaction.MouseWheelZoom.prototype.handleMapBrowserEvent =
     goog.asserts.assertInstanceof(mouseWheelEvent, goog.events.MouseWheelEvent);
 
     this.lastAnchor_ = mapBrowserEvent.coordinate;
-    this.delta_ += mouseWheelEvent.deltaY / 3;
+    this.delta_ += mouseWheelEvent.deltaY;
 
     if (!goog.isDef(this.startTime_)) {
       this.startTime_ = goog.now();