diff --git a/lib/OpenLayers/Control/ArgParser.js b/lib/OpenLayers/Control/ArgParser.js
index 3ba0d49adb..170edd299f 100644
--- a/lib/OpenLayers/Control/ArgParser.js
+++ b/lib/OpenLayers/Control/ArgParser.js
@@ -122,7 +122,7 @@ OpenLayers.Control.ArgParser = OpenLayers.Class(OpenLayers.Control, {
                 this.center = new OpenLayers.LonLat(parseFloat(args.lon),
                                                     parseFloat(args.lat));
                 if (args.zoom) {
-                    this.zoom = parseInt(args.zoom);
+                    this.zoom = parseFloat(args.zoom);
                 }
     
                 // when we add a new baselayer to see when we can set the center