diff --git a/app/library/Mvc/Model/Behavior/RandomId.php b/app/library/Mvc/Model/Behavior/RandomId.php
index 93d3c2a..185c188 100644
--- a/app/library/Mvc/Model/Behavior/RandomId.php
+++ b/app/library/Mvc/Model/Behavior/RandomId.php
@@ -57,11 +57,11 @@ class RandomId extends Behavior implements BehaviorInterface
      */
     public function generateId(\Phalcon\Mvc\ModelInterface $model)
     {
-        $field = $this->_options['field'];
-        $len = $this->_options['length'];
+        $field = $this->options['field'];
+        $len = $this->options['length'];
 
-        if (isset($this->_options['expression'])) {
-            $expr = 'AND ' . $this->_options['expression'];
+        if (isset($this->options['expression'])) {
+            $expr = 'AND ' . $this->options['expression'];
         } else {
             $expr = '';
         }