diff --git a/lib/OpenLayers/BaseTypes.js b/lib/OpenLayers/BaseTypes.js
index da41163621..e50876bede 100644
--- a/lib/OpenLayers/BaseTypes.js
+++ b/lib/OpenLayers/BaseTypes.js
@@ -76,9 +76,14 @@ String.prototype.trim = function() {
  * {Integer} The index of the encountered object, or -1 if not found.
  */
 String.indexOf = function(object) {
- for (var i = 0; i < this.length; i++)
-     if (this[i] == object) return i;
- return -1;
+    var index = -1;
+    for (var i = 0; i < this.length; i++) {
+        if (this[i] == object) {
+            index = i;
+            break;
+        }
+    }
+    return index;
 };
 
 /**