diff --git a/gold-password-input-strength-meter.html b/gold-password-input-strength-meter.html
index a444817..16fe8fc 100644
--- a/gold-password-input-strength-meter.html
+++ b/gold-password-input-strength-meter.html
@@ -158,6 +158,7 @@
         },
 
         ready: function() {
+          isZxcvbnLoaded = typeof zxcvbn !== "undefined";
           if (!isZxcvbnLoaded) {
             isZxcvbnLoaded = true;
             var oScript = document.createElement("script");