diff --git a/lib/OpenLayers/Layer/EventPane.js b/lib/OpenLayers/Layer/EventPane.js
index 02464556d6..71bcb10242 100644
--- a/lib/OpenLayers/Layer/EventPane.js
+++ b/lib/OpenLayers/Layer/EventPane.js
@@ -227,9 +227,9 @@ OpenLayers.Layer.EventPane = OpenLayers.Class(OpenLayers.Layer, {
                     var center = this.getMapObjectLonLatFromOLLonLat(newCenter);
 
                     if (dragging && this.dragPanMapObject) {
-                        var res = this.map.resolution; //readability
-                        var dX = (newCenter.lon - oldCenter.lon) / res;
-                        var dY = (newCenter.lat - oldCenter.lat) / res;
+                        var resolution = this.map.getResolution();
+                        var dX = (newCenter.lon - oldCenter.lon) / resolution;
+                        var dY = (newCenter.lat - oldCenter.lat) / resolution;
                         this.dragPanMapObject(dX, dY);
                     } else {
                         var zoom = this.getMapObjectZoomFromOLZoom(newZoom);