diff --git a/core/js/js.js b/core/js/js.js
index c137f734d9..5f1870eb6c 100644
--- a/core/js/js.js
+++ b/core/js/js.js
@@ -8,7 +8,9 @@
 var oc_debug;
 var oc_webroot;
 var oc_requesttoken;
-oc_webroot = oc_webroot || location.pathname.substr(0, location.pathname.lastIndexOf('/'));
+if (typeof oc_webroot === "undefined") {
+	oc_webroot = location.pathname.substr(0, location.pathname.lastIndexOf('/'));
+}
 if (oc_debug !== true || typeof console === "undefined" || typeof console.log === "undefined") {
 	if (!window.console) {
 		window.console = {};