diff --git a/module/project/config/form.php b/module/project/config/form.php
index 306983341f..ef2b1b3da0 100644
--- a/module/project/config/form.php
+++ b/module/project/config/form.php
@@ -10,7 +10,7 @@ $config->project->form->activate =  array();
 
 $config->project->form->manageProducts = array();
 
-$config->project->form->create['parent']     = array('type' => 'int',    'required' => false, 'default' => '');
+$config->project->form->create['parent']     = array('type' => 'int',    'required' => false, 'default' => 0);
 $config->project->form->create['name']       = array('type' => 'string', 'required' => true, 'filter' => 'trim');
 $config->project->form->create['code']       = array('type' => 'string', 'required' => true, 'filter' => 'trim');
 $config->project->form->create['multiple']   = array('type' => 'string', 'required' => false, 'default' => '');