diff --git a/examples/synthetic-lines.js b/examples/synthetic-lines.js
index 3ca961cb52..f563115837 100644
--- a/examples/synthetic-lines.js
+++ b/examples/synthetic-lines.js
@@ -37,17 +37,19 @@ for (i = 0; i < count; ++i) {
   startPoint = endPoint;
 }
 
+var styleArray = [new ol.style.Style({
+  stroke: new ol.style.Stroke({
+    color: '#666666',
+    width: 1
+  })
+})];
+
 var vector = new ol.layer.Vector({
   source: new ol.source.Vector({
     features: features
   }),
-  styleFunction: function(feature) {
-    return new ol.style.Style({
-      stroke: new ol.style.Stroke({
-        color: '#666666',
-        width: 1
-      })
-    });
+  styleFunction: function(feature, resolution) {
+    return styleArray;
   }
 });