diff --git a/src/ol/source/vectorsource.js b/src/ol/source/vectorsource.js
index 4de918438a..2e4b3240b2 100644
--- a/src/ol/source/vectorsource.js
+++ b/src/ol/source/vectorsource.js
@@ -106,6 +106,20 @@ ol.source.Vector.prototype.addFeatureInternal = function(feature) {
 };
 
 
+/**
+ * Add features without firing a `change` event.
+ * @param {Array.<ol.Feature>} features Features.
+ * @protected
+ */
+ol.source.Vector.prototype.addFeaturesInternal = function(features) {
+  // FIXME use R-Bush bulk load when available
+  var i, ii;
+  for (i = 0, ii = features.length; i < ii; ++i) {
+    this.addFeatureInternal(features[i]);
+  }
+};
+
+
 /**
  * FIXME empty description for jsdoc
  */