diff --git a/lib/OpenLayers/Util.js b/lib/OpenLayers/Util.js
index 0693b38986..967c9fde99 100644
--- a/lib/OpenLayers/Util.js
+++ b/lib/OpenLayers/Util.js
@@ -1522,7 +1522,7 @@ OpenLayers.Util.getVendorPrefixedCss = (function() {
     
     function domToCss(prefixedDom) {
         return prefixedDom.
-            replace(/([A-Z])/g, function(char) { return "-" + char.toLowerCase(); }).
+            replace(/([A-Z])/g, function(c) { return "-" + c.toLowerCase(); }).
             replace(/^ms-/, "-ms-");
     }