diff --git a/src/ol/format/kmlformat.js b/src/ol/format/kmlformat.js
index 6e049f3416..4c2deba5c7 100644
--- a/src/ol/format/kmlformat.js
+++ b/src/ol/format/kmlformat.js
@@ -12,6 +12,7 @@ goog.require('goog.math');
 goog.require('goog.object');
 goog.require('goog.string');
 goog.require('ol.Feature');
+goog.require('ol.array');
 goog.require('ol.feature');
 goog.require('ol.format.XMLFeature');
 goog.require('ol.format.XSD');
@@ -762,7 +763,7 @@ ol.format.KML.readMultiGeometry_ = function(node, objectStack) {
         geometry = geometries[i];
         goog.asserts.assertInstanceof(geometry, ol.geom.Point);
         goog.asserts.assert(geometry.getLayout() == layout);
-        goog.array.extend(flatCoordinates, geometry.getFlatCoordinates());
+        ol.array.safeExtend(flatCoordinates, geometry.getFlatCoordinates());
       }
       var multiPoint = new ol.geom.MultiPoint(null);
       multiPoint.setFlatCoordinates(layout, flatCoordinates);
@@ -828,7 +829,7 @@ ol.format.KML.readPolygon_ = function(node, objectStack) {
     var ends = [flatCoordinates.length];
     var i, ii;
     for (i = 1, ii = flatLinearRings.length; i < ii; ++i) {
-      goog.array.extend(flatCoordinates, flatLinearRings[i]);
+      ol.array.safeExtend(flatCoordinates, flatLinearRings[i]);
       ends.push(flatCoordinates.length);
     }
     polygon.setFlatCoordinates(