diff --git a/etemplate/inc/class.etemplate_widget_tabbox.inc.php b/etemplate/inc/class.etemplate_widget_tabbox.inc.php
index b0a5b86334..e10091e0c0 100644
--- a/etemplate/inc/class.etemplate_widget_tabbox.inc.php
+++ b/etemplate/inc/class.etemplate_widget_tabbox.inc.php
@@ -55,7 +55,8 @@ class etemplate_widget_tabbox extends etemplate_widget
 	public function validate($cname, array $expand, array $content, &$validated=array())
 	{
 		$form_name = self::form_name($cname, $this->id, $expand);
-		if (!$this->is_readonly($cname, $form_name))
+
+		if (!empty($form_name))
 		{
 			$value = self::get_array($content, $form_name);
 			$valid =& self::get_array($validated, $form_name, true);