diff --git a/lib/OpenLayers/Layer.js b/lib/OpenLayers/Layer.js
index fdc4edaa34..25df080238 100644
--- a/lib/OpenLayers/Layer.js
+++ b/lib/OpenLayers/Layer.js
@@ -562,7 +562,7 @@ OpenLayers.Layer = OpenLayers.Class({
             var extent = this.getExtent();
 
             if (extent && this.inRange && this.visibility) {
-                zoomChanged = this.resolution == null ||
+                var zoomChanged = this.resolution == null ||
                               this.resolution !== this.map.getResolution();
                 this.moveTo(extent, zoomChanged, false);
                 this.events.triggerEvent("moveend",