diff --git a/apps/golfview/custom.html b/apps/golfview/custom.html
index 2120b9fb4..54204ac94 100644
--- a/apps/golfview/custom.html
+++ b/apps/golfview/custom.html
@@ -98,7 +98,7 @@
       return course_input;
     }
 
-    let courses = {};
+    var courses = {};
     $("#upload").click(function () {
       sendCustomizedApp({
         storage: courses