diff --git a/etemplate/inc/class.etemplate_widget_tree.inc.php b/etemplate/inc/class.etemplate_widget_tree.inc.php
index 0629f98d80..1712422573 100644
--- a/etemplate/inc/class.etemplate_widget_tree.inc.php
+++ b/etemplate/inc/class.etemplate_widget_tree.inc.php
@@ -32,7 +32,7 @@ egw_framework::includeCSS('/phpgwapi/js/dhtmlxtree/codebase/dhtmlXTree.css');
  *					array(tree::ID => '/INBOX/sub', tree::LABEL => 'sub', tree::IMAGE_LEAF => 'folderClosed.gif'),
  *					array(tree::ID => '/INBOX/sub2', tree::LABEL => 'sub2', tree::IMAGE_LEAF => 'folderClosed.gif'),
  *				),
- *				tree::CHECKED => true
+ *				tree::CHECKED => true,
  * 			),
  * 			array(
  *				tree::ID => '/user',
@@ -41,7 +41,7 @@ egw_framework::includeCSS('/phpgwapi/js/dhtmlxtree/codebase/dhtmlXTree.css');
  *	 				array(tree::ID => '/user/birgit', tree::LABEL => 'birgit', tree::IMAGE_LEAF => 'folderClosed.gif'),
  *					array(tree::ID => '/user/ralf', tree::LABEL => 'ralf', tree::AUTOLOAD_CHILDREN => 1),
  *				),
- *				tree::CHECKED => false
+ *				tree::NOCHECKBOX => true
  * 			),
  * 	));
  *
@@ -99,10 +99,15 @@ class etemplate_widget_tree extends etemplate_widget
 	const OPEN = 'open';
 	
 	/**
-	 * check checkbox if exists (in case of three-state checkboxes values can be:0 unchecked- 1 - checked or -1 - unsure)
+	 * key to check checkbox if exists (in case of three-state checkboxes values can be:0 unchecked- 1 - checked or -1 - unsure)
 	 */
 	const CHECKED = 'checked';
 	
+	/**
+	 * key to instruct the component not to render checkbox for the related item, optional
+	 */
+	const NOCHECKBOX = 'nocheckbox';
+	
 	/**
 	 * Parse and set extra attributes from xml in template object
 	 *