diff --git a/lib/OpenLayers/Popup/Anchored.js b/lib/OpenLayers/Popup/Anchored.js
index 44130cc277..c27569a083 100644
--- a/lib/OpenLayers/Popup/Anchored.js
+++ b/lib/OpenLayers/Popup/Anchored.js
@@ -78,6 +78,18 @@ OpenLayers.Popup.Anchored.prototype =
         OpenLayers.Popup.prototype.moveTo.apply(this, newArguments);
     },
     
+    /**
+    * @param {OpenLayers.Size} size
+    */
+    setSize:function(size) { 
+        OpenLayers.Popup.prototype.setSize.apply(this, arguments);
+
+        if ((this.lonlat) && (this.map)) {
+            var px = this.map.getLayerPxFromLonLat(this.lonlat);
+            this.moveTo(px);
+        }
+    },  
+    
     /** 
      * @private 
      *