diff --git a/framework/control.class.php b/framework/control.class.php
index 6fe28bd99c..675734e109 100644
--- a/framework/control.class.php
+++ b/framework/control.class.php
@@ -129,7 +129,7 @@ class control extends baseControl
 
     /**
      * If change the edition, trigger the upgrade process.
-     * 
+     *
      * @access public
      * @return void
      */
@@ -388,8 +388,11 @@ class control extends baseControl
         if($this->config->edition == 'open') return false;
         if(empty($_POST)) return false;
 
+        $action = $this->dao->select('*')->from(TABLE_WORKFLOWACTION)->where('module')->eq($this->moduleName)->andWhere('action')->eq($this->methodName)->fetch();
+        if($action->extensionType == 'none' and $action->buildin == 1) return false;
+
         $flow    = $this->dao->select('*')->from(TABLE_WORKFLOW)->where('module')->eq($this->moduleName)->fetch();
-        $fields  = $this->loadModel('workflowaction')->getFields($this->moduleName, $this->methodName);
+        $fields  = $this->workflowaction->getFields($this->moduleName, $this->methodName);
         $layouts = $this->loadModel('workflowlayout')->getFields($this->moduleName, $this->methodName);
         $rules   = $this->dao->select('*')->from(TABLE_WORKFLOWRULE)->orderBy('id_desc')->fetchAll('id');