diff --git a/examples/device-orientation.js b/examples/device-orientation.js
index caf1f8cf98..657e9d041f 100644
--- a/examples/device-orientation.js
+++ b/examples/device-orientation.js
@@ -26,11 +26,10 @@ var track = new ol.dom.Input(document.getElementById('track'));
 track.bindTo('checked', deviceOrientation, 'tracking');
 
 deviceOrientation.on('propertychange', function(event) {
-  // event.getKey() is the changed property name
-  var key = event.getKey();
-  var element = document.getElementById(key);
+  // event.key is the changed property name
+  var element = document.getElementById(event.key);
   if (element) {
-    element.innerHTML = deviceOrientation.get(key);
+    element.innerHTML = deviceOrientation.get(event.key);
   }
 });
 
diff --git a/externs/oli.js b/externs/oli.js
index 1e1b3ac78d..7b665ab63a 100644
--- a/externs/oli.js
+++ b/externs/oli.js
@@ -18,6 +18,15 @@ oli.CollectionEvent = function() {};
 oli.CollectionEvent.prototype.element;
 
 
+/** @interface */
+oli.ObjectEvent;
+
+
+/** @type {string} */
+oli.ObjectEvent.prototype.key;
+
+
+
 /**
  * @interface
  */
diff --git a/src/ol/object.exports b/src/ol/object.exports
index dacc157656..89426170a5 100644
--- a/src/ol/object.exports
+++ b/src/ol/object.exports
@@ -7,5 +7,3 @@
 @exportProperty ol.Object.prototype.setValues
 @exportProperty ol.Object.prototype.unbind
 @exportProperty ol.Object.prototype.unbindAll
-
-@exportProperty ol.ObjectEvent.prototype.getKey
diff --git a/src/ol/object.js b/src/ol/object.js
index 14edbb94c6..c8eacc40fb 100644
--- a/src/ol/object.js
+++ b/src/ol/object.js
@@ -33,6 +33,7 @@ ol.ObjectEventType = {
  * @param {string} type The event type.
  * @param {string} key The property name.
  * @extends {goog.events.Event}
+ * @implements {oli.ObjectEvent}
  * @constructor
  */
 ol.ObjectEvent = function(type, key) {
@@ -41,23 +42,13 @@ ol.ObjectEvent = function(type, key) {
   /**
    * The name of the property whose value is changing.
    * @type {string}
-   * @private
    */
-  this.key_ = key;
+  this.key = key;
 
 };
 goog.inherits(ol.ObjectEvent, goog.events.Event);
 
 
-/**
- * Get the name of the property associated with this event.
- * @return {string} Object property name.
- */
-ol.ObjectEvent.prototype.getKey = function() {
-  return this.key_;
-};
-
-
 
 /**
  * @constructor
@@ -277,7 +268,7 @@ ol.Object.prototype.createBeforeChangeListener_ = function(key, targetKey) {
    * @this {ol.Object}
    */
   return function(event) {
-    if (event.getKey() === targetKey) {
+    if (event.key === targetKey) {
       this.dispatchEvent(
           new ol.ObjectEvent(ol.ObjectEventType.BEFOREPROPERTYCHANGE, key));
     }
diff --git a/test/spec/ol/object.test.js b/test/spec/ol/object.test.js
index f82bb37a9e..78938d8bbc 100644
--- a/test/spec/ol/object.test.js
+++ b/test/spec/ol/object.test.js
@@ -125,7 +125,7 @@ describe('ol.Object', function() {
       var args = listener2.firstCall.args;
       expect(args).to.have.length(1);
       var event = args[0];
-      expect(event.getKey()).to.be('k');
+      expect(event.key).to.be('k');
     });
 
     it('dispatches events to bound objects', function() {
@@ -165,7 +165,7 @@ describe('ol.Object', function() {
       var args = listener2.firstCall.args;
       expect(args).to.have.length(1);
       var event = args[0];
-      expect(event.getKey()).to.be('k');
+      expect(event.key).to.be('k');
     });
 
     it('dispatches beforechange events to object', function() {
@@ -173,7 +173,7 @@ describe('ol.Object', function() {
 
       var oldValue;
       var beforeListener = sinon.spy(function(event) {
-        oldValue = o2.get(event.getKey());
+        oldValue = o2.get(event.key);
       });
       o.on(ol.ObjectEventType.BEFOREPROPERTYCHANGE, beforeListener);
 
@@ -201,7 +201,7 @@ describe('ol.Object', function() {
       var args = listener2.firstCall.args;
       expect(args).to.have.length(1);
       var event = args[0];
-      expect(event.getKey()).to.be('k');
+      expect(event.key).to.be('k');
     });
 
     it('dispatches beforechange before changing bound objects', function() {
@@ -209,7 +209,7 @@ describe('ol.Object', function() {
 
       var oldValue;
       var beforeListener = sinon.spy(function(event) {
-        oldValue = o2.get(event.getKey());
+        oldValue = o2.get(event.key);
       });
       o.on(ol.ObjectEventType.BEFOREPROPERTYCHANGE, beforeListener);
 
@@ -218,7 +218,7 @@ describe('ol.Object', function() {
       var args = beforeListener.firstCall.args;
       expect(args).to.have.length(1);
       var event = args[0];
-      expect(event.getKey()).to.be('k');
+      expect(event.key).to.be('k');
 
       expect(oldValue).to.be(1);
     });
@@ -232,7 +232,7 @@ describe('ol.Object', function() {
 
       var oldValue;
       var beforeListener = sinon.spy(function(event) {
-        oldValue = object.get(event.getKey());
+        oldValue = object.get(event.key);
       });
       object.on(ol.ObjectEventType.BEFOREPROPERTYCHANGE, beforeListener);
 
@@ -241,7 +241,7 @@ describe('ol.Object', function() {
       var args = beforeListener.firstCall.args;
       expect(args).to.have.length(1);
       var event = args[0];
-      expect(event.getKey()).to.be('foo');
+      expect(event.key).to.be('foo');
 
       expect(oldValue).to.be('original value');
       expect(object.get('foo')).to.be('new value');
@@ -256,7 +256,7 @@ describe('ol.Object', function() {
 
       var oldValue;
       var beforeListener = sinon.spy(function(event) {
-        oldValue = object.get(event.getKey());
+        oldValue = object.get(event.key);
       });
       object.on(ol.ObjectEventType.BEFOREPROPERTYCHANGE, beforeListener);
 
@@ -265,7 +265,7 @@ describe('ol.Object', function() {
       var args = beforeListener.firstCall.args;
       expect(args).to.have.length(1);
       var event = args[0];
-      expect(event.getKey()).to.be('bar');
+      expect(event.key).to.be('bar');
 
       expect(oldValue).to.be('original value');
       expect(object.get('bar')).to.be('new value');
@@ -365,7 +365,7 @@ describe('ol.Object', function() {
       expect(listener.calledOnce).to.be(true);
       var call = listener.firstCall;
       expect(call.args).to.have.length(1);
-      expect(call.args[0].getKey()).to.be('foo');
+      expect(call.args[0].key).to.be('foo');
 
       object.unbind('foo');
       target.set('foo', 'another new value');
@@ -400,7 +400,7 @@ describe('ol.Object', function() {
       expect(listener.callCount).to.be(3);
       var lastCall = listener.getCall(2);
       expect(lastCall.args).to.have.length(1);
-      expect(lastCall.args[0].getKey()).to.be('bar');
+      expect(lastCall.args[0].key).to.be('bar');
     });
 
   });