diff --git a/lib/cartodb/api/query_tables_api.js b/lib/cartodb/api/query_tables_api.js
index 9782d91a..18920b59 100644
--- a/lib/cartodb/api/query_tables_api.js
+++ b/lib/cartodb/api/query_tables_api.js
@@ -80,11 +80,12 @@ QueryTablesApi.prototype.getAffectedTablesAndLastUpdatedTime = function (usernam
             return;
         }
 
-        var qtables = rows[0].tablenames;
-        var tableNames = qtables.split(/^\{(.*)\}$/)[1];
+        var result = rows[0];
+
+        var tableNames = result.tablenames.split(/^\{(.*)\}$/)[1];
         tableNames = tableNames ? tableNames.split(',') : [];
 
-        var lastUpdatedTime = rows[0].max || 0;
+        var lastUpdatedTime = result.max || 0;
 
         callback(null, {
             affectedTables: tableNames,