diff --git a/lib/OpenLayers/Control/MouseDefaults.js b/lib/OpenLayers/Control/MouseDefaults.js
index 440ed2698a..d48386ec51 100644
--- a/lib/OpenLayers/Control/MouseDefaults.js
+++ b/lib/OpenLayers/Control/MouseDefaults.js
@@ -31,9 +31,9 @@ OpenLayers.Control.MouseDefaults.prototype =
             this.map.div.style.cursor = "crosshair";
             this.zoomBox = OpenLayers.Util.createDiv('zoomBox');
             this.zoomBox.style.border = '2px solid red';
-	    this.zoomBox.style.backgroundColor = "white";
-	    this.zoomBox.style.filter = "alpha(opacity=35)"; // IE
-	    this.zoomBox.style.opacity = "0.35";
+            this.zoomBox.style.backgroundColor = "white";
+            this.zoomBox.style.filter = "alpha(opacity=35)"; // IE
+            this.zoomBox.style.opacity = "0.35";
             this.zoomBox.style.position="absolute";
             this.zoomBox.style.zIndex=1000;
             this.zoomBox.style.top=this.mouseDragStart.y;