diff --git a/source/Ox/js/Constants.js b/source/Ox/js/Constants.js
index 10ed071e..68fcdabd 100644
--- a/source/Ox/js/Constants.js
+++ b/source/Ox/js/Constants.js
@@ -90,11 +90,12 @@ Ox.SHORT_MONTHS = Ox.MONTHS.map(function(val) {
 //@ Ox.PATH <str> Path of Ox.js
 Ox.PATH = (function() {
     // IE8 can't apply slice to NodeLists, see Ox.slice
-    var index, scripts = document.getElementsByTagName('script');
+    var index, regexp = /Ox\.js(\?\d+|)$/,
+        scripts = document.getElementsByTagName('script'), src;
     for (index = scripts.length - 1; index >= 0; index--) {
-        var src = scripts[index].src;
-        if (/Ox\.js(\?\d+|)$/.test(src)) {
-            return src.replace(/Ox\.js(\?\d+|)$/, '');
+        src = scripts[index].src;
+        if (regexp.test(src)) {
+            return src.replace(regexp, '');
         }
     }
 }());