diff --git a/lib/storage/moderator.js b/lib/storage/moderator.js
index 0251e7fa9..b889497c1 100644
--- a/lib/storage/moderator.js
+++ b/lib/storage/moderator.js
@@ -40,7 +40,8 @@ Moderator.getAllKeys = function (Env) {
         });
         return keys;
     } catch (e) {
-        return;
+        // ENOENT, return empty array
+        return [];
     }
 };
 Moderator.getAll = function (Env, cb) {