diff --git a/src/ol/image.js b/src/ol/image.js
index e1881c0cae..f2492ceaa8 100644
--- a/src/ol/image.js
+++ b/src/ol/image.js
@@ -51,7 +51,7 @@ ol.Image = function(extent, resolution, pixelRatio, attributions, src,
 
   /**
    * @private
-   * @type {Array.<number>}
+   * @type {Array.<goog.events.Key>}
    */
   this.imageListenerKeys_ = null;
 
diff --git a/src/ol/imagetile.js b/src/ol/imagetile.js
index 4deb7bd362..1baec02742 100644
--- a/src/ol/imagetile.js
+++ b/src/ol/imagetile.js
@@ -50,7 +50,7 @@ ol.ImageTile = function(tileCoord, state, src, crossOrigin, tileLoadFunction) {
 
   /**
    * @private
-   * @type {Array.<number>}
+   * @type {Array.<goog.events.Key>}
    */
   this.imageListenerKeys_ = null;
 
diff --git a/src/ol/mapbrowserevent.js b/src/ol/mapbrowserevent.js
index 56b508cccc..03a1d576fc 100644
--- a/src/ol/mapbrowserevent.js
+++ b/src/ol/mapbrowserevent.js
@@ -156,7 +156,7 @@ ol.MapBrowserEventHandler = function(map) {
   this.dragging_ = false;
 
   /**
-   * @type {Array.<number>}
+   * @type {Array.<goog.events.Key>}
    * @private
    */
   this.dragListenerKeys_ = null;
diff --git a/src/ol/style/iconstyle.js b/src/ol/style/iconstyle.js
index e9130b3b06..c25d58874e 100644
--- a/src/ol/style/iconstyle.js
+++ b/src/ol/style/iconstyle.js
@@ -377,7 +377,7 @@ ol.style.IconImage_ = function(image, src, crossOrigin, imageState) {
 
   /**
    * @private
-   * @type {Array.<number>}
+   * @type {Array.<goog.events.Key>}
    */
   this.imageListenerKeys_ = null;