diff --git a/lib/torque/provider.json.js b/lib/torque/provider.json.js
index 5a4e8c8..1099410 100644
--- a/lib/torque/provider.json.js
+++ b/lib/torque/provider.json.js
@@ -129,7 +129,7 @@
     url: function() {
       var opts = this.options;
       var port = opts.sql_api_port;
-      var domain = (opts.sql_api_domain || (this.options.user + '.cartodb.com')) + (port ? ':' + port: '');
+      var domain = (opts.user_name + '.' + (opts.sql_api_domain || 'cartodb.com')) + (port ? ':' + port: '');
       var protocol = opts.sql_api_protocol || 'http';
       return this.options.url || protocol + '://' + domain + '/api/v2/sql';
     },
diff --git a/test/provider.json.js b/test/provider.json.js
index c1a377f..9b76909 100644
--- a/test/provider.json.js
+++ b/test/provider.json.js
@@ -4,7 +4,7 @@ module('provider.json')
 QUnit.testStart(function() {
     json = new torque.providers.json({
       table: 'test',
-      user: "rambo",
+      user_name: "rambo",
       resolution: 1,
       steps: 10,
       extra_params: {