diff --git a/lib/OpenLayers/Popup.js b/lib/OpenLayers/Popup.js
index 2b9c536273..839ce4674b 100644
--- a/lib/OpenLayers/Popup.js
+++ b/lib/OpenLayers/Popup.js
@@ -6,7 +6,8 @@
 OpenLayers.Popup = Class.create();
 
 OpenLayers.Popup.count = 0;
-OpenLayers.Popup.SIZE = new OpenLayers.Size(200, 200);
+OpenLayers.Popup.WIDTH = 200;
+OpenLayers.Popup.HEIGHT = 200;
 OpenLayers.Popup.COLOR = "white";
 OpenLayers.Popup.OPACITY = 1;
 OpenLayers.Popup.BORDER = "0px";
@@ -53,7 +54,10 @@ OpenLayers.Popup.prototype = {
         OpenLayers.Popup.count += 1;
         this.id = (id != null) ? id : "Popup" + OpenLayers.Popup.count;
         this.lonlat = lonlat;
-        this.size = (size != null) ? size : OpenLayers.Popup.SIZE;
+        this.size = (size != null) ? size 
+                                  : new OpenLayers.Size(
+                                                   OpenLayers.Popup.WIDTH,
+                                                   OpenLayers.Popup.HEIGHT);
         if (contentHTML != null) { 
              this.contentHTML = contentHTML;
         }
diff --git a/tests/test_Popup.html b/tests/test_Popup.html
index 9ac7b06ba5..e1a474a7a9 100644
--- a/tests/test_Popup.html
+++ b/tests/test_Popup.html
@@ -11,8 +11,8 @@
 
         t.ok( popup instanceof OpenLayers.Popup, "new OpenLayers.Popup returns Popup object" );
         t.ok(popup.id.startsWith("Popup"), "good default popup.id");
-        t.eq(popup.size.w, OpenLayers.Popup.SIZE.w, "good default popup.size.w");
-        t.eq(popup.size.h, OpenLayers.Popup.SIZE.h, "good default popup.size.h");
+        t.eq(popup.size.w, OpenLayers.Popup.WIDTH, "good default popup.size.w");
+        t.eq(popup.size.h, OpenLayers.Popup.HEIGHT, "good default popup.size.h");
         t.eq(popup.contentHTML, "", "good default popup.contentHTML");
         t.eq(popup.backgroundColor, OpenLayers.Popup.COLOR, "good default popup.backgroundColor");
         t.eq(popup.opacity, OpenLayers.Popup.OPACITY, "good default popup.opacity");