diff --git a/lib/abstract-class.js b/lib/abstract-class.js
index aa958c5b..ab33b431 100644
--- a/lib/abstract-class.js
+++ b/lib/abstract-class.js
@@ -355,6 +355,8 @@ AbstractClass.all = function all(params, cb) {
             }
             cb(err, collection);
         }
+        else
+            cb(err, []);
     });
 };