diff --git a/lib/cartodb/models/resource-locator.js b/lib/cartodb/models/resource-locator.js
index f9b1c1ad..efdabce7 100644
--- a/lib/cartodb/models/resource-locator.js
+++ b/lib/cartodb/models/resource-locator.js
@@ -1,3 +1,5 @@
+'use strict';
+
 var dot = require('dot');
 dot.templateSettings.strip = false;