diff --git a/lib/OpenLayers/Layer/ArcIMS.js b/lib/OpenLayers/Layer/ArcIMS.js
index eb7dbc983c..bfe01811fa 100644
--- a/lib/OpenLayers/Layer/ArcIMS.js
+++ b/lib/OpenLayers/Layer/ArcIMS.js
@@ -29,12 +29,6 @@ OpenLayers.Layer.ArcIMS = OpenLayers.Class(OpenLayers.Layer.Grid, {
         ServiceName: ''
     },
     
-    /**
-     * APIProperty: tileSize
-     * {<OpenLayers.Size>} Size for tiles.  Default is 512x512.
-     */
-    tileSize: null,
-    
     /**
      * APIProperty: featureCoordSys
      * {String} Code for feature coordinate system.  Default is "4326".