diff --git a/lib/OpenLayers/Layer/WFS.js b/lib/OpenLayers/Layer/WFS.js
index 7063d4f8cc..03c2928569 100644
--- a/lib/OpenLayers/Layer/WFS.js
+++ b/lib/OpenLayers/Layer/WFS.js
@@ -42,7 +42,7 @@ OpenLayers.Layer.WFS.prototype =
         OpenLayers.Layer.Grid.prototype.initialize.apply(this, newArguments);
         OpenLayers.Layer.Markers.prototype.initialize.apply(this, newArguments);
 
-        if (options['tileSize']) {
+        if (options && options['tileSize']) {
             this.tileSize = options['tileSize'].copyOf();
         } else {
             this.tileSize = new OpenLayers.Size(256, 256);