diff --git a/html/script.js b/html/script.js
index 1655879..2415e62 100644
--- a/html/script.js
+++ b/html/script.js
@@ -2,6 +2,7 @@
// early.js takes care of getting some history files while the html page and
// some javascript libraries are still loading, hopefully speeding up loading
+
"use strict";
g.planes = {};