diff --git a/examples/gpx-trkpt.js b/examples/gpx-trkpt.js
index 0e7e9e97e0..b0b330a57f 100644
--- a/examples/gpx-trkpt.js
+++ b/examples/gpx-trkpt.js
@@ -4,8 +4,11 @@ goog.require('ol.View2D');
 goog.require('ol.layer.Tile');
 goog.require('ol.layer.Vector');
 goog.require('ol.parser.GPX');
+goog.require('ol.proj');
 goog.require('ol.source.OSM');
 goog.require('ol.source.Vector');
+goog.require('ol.style.Stroke');
+goog.require('ol.style.Style');
 
 var raster = new ol.layer.Tile({
   source: new ol.source.OSM()