diff --git a/code/model/SiteTree.php b/code/model/SiteTree.php
index <HASH>..<HASH> 100644
--- a/code/model/SiteTree.php
+++ b/code/model/SiteTree.php
@@ -121,6 +121,7 @@ class SiteTree extends DataObject implements PermissionProvider,i18nEntityProvid
 		'Link' => 'Text',
 		'RelativeLink' => 'Text',
 		'AbsoluteLink' => 'Text',
+		'TreeTitle' => 'HTMLText',
 	);
 
 	private static $defaults = array(
Hints for SiteTree.TreeTitle casting

Relates to SS-<I>-<I>