diff --git a/lib/OpenLayers/Layer/Grid.js b/lib/OpenLayers/Layer/Grid.js
index 0b47935bd0..3d4181e881 100644
--- a/lib/OpenLayers/Layer/Grid.js
+++ b/lib/OpenLayers/Layer/Grid.js
@@ -77,6 +77,7 @@ OpenLayers.Layer.Grid = OpenLayers.Class(OpenLayers.Layer.HTTPRequest, {
     /** APIProperty: ratio
      *  {Float} Used only when in single-tile mode, this specifies the 
      *          ratio of the size of the single tile to the size of the map.
+     *          Default value is 1.5.
      */
     ratio: 1.5,