diff --git a/lib/cartodb/api/overviews_api.js b/lib/cartodb/api/overviews_api.js
index b3db3101..c5f9ff76 100644
--- a/lib/cartodb/api/overviews_api.js
+++ b/lib/cartodb/api/overviews_api.js
@@ -24,19 +24,17 @@ OverviewsApi.prototype.getOverviewsMetadata = function (username, sql, callback)
             var q = queue(parallelism);
 
             for ( var i=0; i < tableNames.length; ++i ) {
-                (function(tableName) {
-                    q.defer(function(done){
-                        var sql = "SELECT * FROM CDB_Overviews('" + tableName + "');";
-                        this.pgQueryRunner.run(username, query, handleOverviewsRows, function(err, table_metadata){
-                            if (err) {
-                                done(err);
-                            } else {
-                                metadata[tableName] = table_metadata;
-                                done(null);
-                            }
-                        });
+                q.defer(function(tableName, done){
+                    var sql = "SELECT * FROM CDB_Overviews('" + tableName + "');";
+                    this.pgQueryRunner.run(username, query, handleOverviewsRows, function(err, table_metadata){
+                        if (err) {
+                            done(err);
+                        } else {
+                            metadata[tableName] = table_metadata;
+                            done(null);
+                        }
                     });
-                }(tableNames[i]));
+                }, tableNames[i]);
             }
 
             q.awaitAll(function(err, results){
diff --git a/lib/cartodb/models/mapconfig_overviews_adapter.js b/lib/cartodb/models/mapconfig_overviews_adapter.js
index 74ac85e5..21fd5c37 100644
--- a/lib/cartodb/models/mapconfig_overviews_adapter.js
+++ b/lib/cartodb/models/mapconfig_overviews_adapter.js
@@ -16,14 +16,12 @@ MapConfigNamedLayersAdapter.prototype.getMapConfig = function(username, mapconfi
     var q = queue(parallelism);
 
     for ( var i=0; i < layers.length; ++i ) {
-        (function(layer) {
-            q.defer(function(done){
-                this.overviewsApi.getOverviewsMetadata(username, layer.options.sql, function(err, metadata){
-                     // TODO: is it legit to modify layer like this?
-                     layer.options.overviews = metadata;
-                });
+        q.defer(function(layer, done){
+            this.overviewsApi.getOverviewsMetadata(username, layer.options.sql, function(err, metadata){
+                 // TODO: is it legit to modify layer like this?
+                 layer.options.overviews = metadata;
             });
-        })(layers[i]);
+        }, layers[i]);
     };
 
     q.awaitAll(function(err){