diff --git a/themes/blueprint/js/preview.js b/themes/blueprint/js/preview.js
index 371b45f559ad845e4a86624a9079ab5671a8c234..793d225bb4c9bdc0766b4d838077a549f710ff48 100644
--- a/themes/blueprint/js/preview.js
+++ b/themes/blueprint/js/preview.js
@@ -77,9 +77,9 @@ function setIndexOf() {
             throw new TypeError();
         }
         var t = Object(this);
-        /*jslint bitwise: true*/
-        var len = t.length >>> 0;
         /*jslint bitwise: false*/
+        var len = t.length >>> 0;
+        /*jslint bitwise: true*/
         if (len === 0) {
             return -1;
         }