diff --git a/lib/cartodb/controllers/layergroup.js b/lib/cartodb/controllers/layergroup.js
index 63210eb4..f2440306 100644
--- a/lib/cartodb/controllers/layergroup.js
+++ b/lib/cartodb/controllers/layergroup.js
@@ -183,10 +183,10 @@ LayergroupController.prototype.staticMap = function(req, res, width, height, zoo
     var self = this;
 
     step(
-        function() {
+        function reqParams() {
             self.req2params(req, this);
         },
-        function(err) {
+        function getImage(err) {
             assert.ifError(err);
             if (center) {
                 self.previewBackend.getImage(