diff --git a/lib/OpenLayers/Util.js b/lib/OpenLayers/Util.js
index dcdd95cabd..661c00d320 100644
--- a/lib/OpenLayers/Util.js
+++ b/lib/OpenLayers/Util.js
@@ -1699,6 +1699,8 @@ OpenLayers.Util.getFormattedLonLat = function(coordinate, axis, dmsOption) {
 
 OpenLayers.Util.requestAnimationFrame = (function() {
     return window.requestAnimationFrame ||
+OpenLayers.Util.requestAnimationFrame = (function(window) {
+    var request = window.requestAnimationFrame ||
         window.webkitRequestAnimationFrame ||
         window.mozRequestAnimationFrame ||
         window.oRequestAnimationFrame ||
@@ -1706,7 +1708,11 @@ OpenLayers.Util.requestAnimationFrame = (function() {
         function(callback, element) {
             window.setTimeout(callback, 16);
         };
-})();
+    // bind to window to avoid illegal invocation of native function
+    return function(callback, element) {
+        request.apply(window, [callback, element]);
+    };
+})(window);
 
 (function() {