diff --git a/demos/side-by-side/side-by-side.js b/demos/side-by-side/side-by-side.js
index 68387625b8..67b72bc41a 100644
--- a/demos/side-by-side/side-by-side.js
+++ b/demos/side-by-side/side-by-side.js
@@ -21,10 +21,12 @@ var webglMap = ol.createMap(
     document.getElementById('webglMap'),
     {},
     ol.RendererHint.WEBGL);
-webglMap.bindTo('center', domMap);
-webglMap.bindTo('layers', domMap);
-webglMap.bindTo('resolution', domMap);
-webglMap.bindTo('rotation', domMap);
+if (!goog.isNull(webglMap)) {
+  webglMap.bindTo('center', domMap);
+  webglMap.bindTo('layers', domMap);
+  webglMap.bindTo('resolution', domMap);
+  webglMap.bindTo('rotation', domMap);
+}
 
 var attributionView = new ol.view.Attribution(domMap);
 document.getElementById('attribution').appendChild(