diff --git a/lib/OpenLayers/Popup.js b/lib/OpenLayers/Popup.js
index 8012e74a8a..ffd074e691 100644
--- a/lib/OpenLayers/Popup.js
+++ b/lib/OpenLayers/Popup.js
@@ -153,7 +153,7 @@ OpenLayers.Popup = OpenLayers.Class({
         this.groupDiv.appendChild(this.contentDiv);
         this.div.appendChild(this.groupDiv);
 
-        if (closeBox == true) {
+        if (closeBox) {
            // close icon
             var closeSize = new OpenLayers.Size(17,17);
             var img = OpenLayers.Util.getImagesLocation() + "close.gif";