diff --git a/lib/OpenLayers/Layer/KaMap.js b/lib/OpenLayers/Layer/KaMap.js
index 212621f86b..786d581f41 100644
--- a/lib/OpenLayers/Layer/KaMap.js
+++ b/lib/OpenLayers/Layer/KaMap.js
@@ -49,7 +49,7 @@ OpenLayers.Layer.KaMap.prototype =
      */
     getURL: function (bounds) {
         var mapRes = this.map.getResolution();
-        var scale = this.map.getScale();        
+        var scale = Math.round((this.map.getScale() * 10000) / 10000);        
         var cellSize = new OpenLayers.Size(mapRes*this.tileSize.w, mapRes*this.tileSize.h);
         var pX = Math.round(((bounds.left) / cellSize.w) * this.tileSize.w);
         var pY = -Math.round(((bounds.top) / cellSize.h) * this.tileSize.h);