diff --git a/js/functions.js b/js/functions.js
index 007af4ade3..77bba26d53 100644
--- a/js/functions.js
+++ b/js/functions.js
@@ -3790,7 +3790,7 @@ AJAX.registerOnload('functions.js', function () {
             cache: false,
             type: 'POST',
             data: {
-                favorite_tables: (isStorageSupported('localStorage'))
+                favorite_tables: (isStorageSupported('localStorage') && typeof window.localStorage['favorite_tables'] != 'undefined')
                     ? window.localStorage['favorite_tables']
                     : ''
             },
diff --git a/js/navigation.js b/js/navigation.js
index 9796d1f64c..f20d591391 100644
--- a/js/navigation.js
+++ b/js/navigation.js
@@ -487,7 +487,7 @@ $(function () {
             cache: false,
             type: 'POST',
             data: {
-                favorite_tables: (isStorageSupported('localStorage'))
+                favorite_tables: (isStorageSupported('localStorage') && typeof window.localStorage.favorite_tables != 'undefined')
                     ? window.localStorage.favorite_tables
                     : ''
             },