diff --git a/lib/OpenLayers/Map.js b/lib/OpenLayers/Map.js
index 4e1d398261..14f8c96354 100644
--- a/lib/OpenLayers/Map.js
+++ b/lib/OpenLayers/Map.js
@@ -475,17 +475,20 @@ OpenLayers.Map.prototype = {
             for(var i=0; i < this.layers.length; i++) {
                 this.layers[i].onMapResize();                
             }
-
-            var center = new OpenLayers.Pixel(newSize.w /2, newSize.h / 2);
-            
-            var zoom = this.getZoom();
-            this.zoom = null;
-            this.setCenter(center, zoom);
             
             // store the new size
             this.size = newSize;
             // the div might have moved on the page, also
             this.events.element.offsets = null;
+
+            if (this.baseLayer != null) {
+                var center = new OpenLayers.Pixel(newSize.w /2, newSize.h / 2);
+                var centerLL = this.getLonLatFromViewPortPx(center);
+                var zoom = this.getZoom();
+                this.zoom = null;
+                this.setCenter(this.getCenter(), zoom);
+            }
+
         }
     },