diff --git a/build/dat.gui.js b/build/dat.gui.js
index bbfcea4..f2731fc 100644
--- a/build/dat.gui.js
+++ b/build/dat.gui.js
@@ -2604,11 +2604,11 @@ dat.GUI = dat.gui.GUI = (function (css, saveDialogueContents, styleSheet, contro
   }
 
   function getLocalStorageHash(gui, key) {
-    // TODO how does this deal with multiple GUI's?
-    return document.location.href + '.' + key;
-
+    var namespace = localStorage.getItem('dat.gui.namespace') || document.location.href;
+    return 'dat.gui.' + namespace + '.' + key;
   }
 
+
   function addSaveMenu(gui) {
 
     var div = gui.__save_row = document.createElement('li');
diff --git a/src/dat/gui/GUI.js b/src/dat/gui/GUI.js
index d06d8e9..ec544e3 100644
--- a/src/dat/gui/GUI.js
+++ b/src/dat/gui/GUI.js
@@ -1109,11 +1109,11 @@ define([
   }
 
   function getLocalStorageHash(gui, key) {
-    // TODO how does this deal with multiple GUI's?
-    return document.location.href + '.' + key;
-
+    var namespace = localStorage.getItem('dat.gui.namespace') || document.location.href;
+    return 'dat.gui.' + namespace + '.' + key;
   }
 
+
   function addSaveMenu(gui) {
 
     var div = gui.__save_row = document.createElement('li');