diff --git a/common/modules/storage.jsm b/common/modules/storage.jsm
index 5bc7cada..0f4cc06e 100644
--- a/common/modules/storage.jsm
+++ b/common/modules/storage.jsm
@@ -42,7 +42,7 @@ var StoreBase = Class("StoreBase", {
         return res;
     },
 
-    changed: function () { this.timer.tell(); },
+    changed: function () { this.timer && this.timer.tell(); },
 
     reload: function reload() {
         this._object = this._load() || this._constructor();