diff --git a/src/ol/source/source.js b/src/ol/source/source.js
index 6d52d6616b..7d1cf9bc43 100644
--- a/src/ol/source/source.js
+++ b/src/ol/source/source.js
@@ -49,6 +49,14 @@ ol.source.Source = function(options) {
 goog.inherits(ol.source.Source, goog.events.EventTarget);
 
 
+/**
+ * @protected
+ */
+ol.source.Source.prototype.dispatchChangeEvent = function() {
+  this.dispatchEvent(goog.events.EventType.CHANGE);
+};
+
+
 /**
  * @protected
  */