--- a/mobile/android/components/HelperAppDialog.js
+++ b/mobile/android/components/HelperAppDialog.js
@@ -235,17 +235,17 @@ HelperAppLauncherDialog.prototype = {
     });
   },
 
   /**
    * In the system app chooser, the order of the "Always" and "Just once" buttons has been swapped
    * around starting from Lollipop.
    */
   _useNewButtonOrder: function() {
-    let _useNewButtonOrder = true;
+    let useNewButtonOrder = true;
     let jenv = null;
 
     try {
       jenv = JNI.GetForThread();
       let jAppConstants = JNI.LoadClass(jenv, "org.mozilla.gecko.AppConstants$Versions", {
         static_fields: [
           { name: "feature21Plus", sig: "Z" }
         ],