diff --git a/src/dat/gui/GUI.js b/src/dat/gui/GUI.js
index 79908c0..eab04b2 100644
--- a/src/dat/gui/GUI.js
+++ b/src/dat/gui/GUI.js
@@ -1023,7 +1023,7 @@ function add(gui, object, property, params) {
 }
 
 function getLocalStorageHash(gui, key) {
-  var namespace = localStorage.getItem('dat.gui.namespace') || document.location.href;
+  const namespace = localStorage.getItem('dat.gui.namespace') || document.location.href;
   return 'dat.gui.' + namespace + '.' + key;
 }