diff --git a/src/ol/interaction/draganddropinteraction.js b/src/ol/interaction/draganddropinteraction.js
index 4496ef4414..2297e2316d 100644
--- a/src/ol/interaction/draganddropinteraction.js
+++ b/src/ol/interaction/draganddropinteraction.js
@@ -219,18 +219,21 @@ ol.interaction.DragAndDropEvent =
   goog.base(this, type, target);
 
   /**
+   * The features parsed from dropped data.
    * @type {Array.<ol.Feature>|undefined}
    * @api stable
    */
   this.features = opt_features;
 
   /**
+   * The dropped file.
    * @type {File}
    * @api stable
    */
   this.file = file;
 
   /**
+   * The feature projection.
    * @type {ol.proj.Projection|undefined}
    * @api
    */