diff --git a/src/ol/interaction/mousewheelzoominteraction.js b/src/ol/interaction/mousewheelzoominteraction.js
index bc56288bc2..c163a61014 100644
--- a/src/ol/interaction/mousewheelzoominteraction.js
+++ b/src/ol/interaction/mousewheelzoominteraction.js
@@ -62,6 +62,8 @@ goog.inherits(ol.interaction.MouseWheelZoom, ol.interaction.Interaction);
 
 
 /**
+ * Handles the {@link ol.MapBrowserEvent map browser event} (if it was a
+ * mousewheel-event) and eventually zooms the map.
  * @param {ol.MapBrowserEvent} mapBrowserEvent Map browser event.
  * @return {boolean} `false` to stop event propagation.
  * @this {ol.interaction.MouseWheelZoom}