diff --git a/src/database/mongo/sets.js b/src/database/mongo/sets.js
index 7b0049068e..927337fbff 100644
--- a/src/database/mongo/sets.js
+++ b/src/database/mongo/sets.js
@@ -1,5 +1,7 @@
 "use strict";
 
+var winston = require('winston');
+
 module.exports = function(db, module) {
 	var helpers = module.helpers.mongo;