diff --git a/src/TaxonomyTerm.php b/src/TaxonomyTerm.php
index 8c50fd2..329ee27 100644
--- a/src/TaxonomyTerm.php
+++ b/src/TaxonomyTerm.php
@@ -60,6 +60,8 @@ class TaxonomyTerm extends DataObject implements PermissionProvider
 
     private static $default_sort = 'Sort';
 
+    private static string $sort_field = 'Sort';
+
     private static $summary_fields = array(
         'Name' => 'Name',
         'Type.Name' => 'Type'
@@ -67,6 +69,12 @@ class TaxonomyTerm extends DataObject implements PermissionProvider
 
     private static $type_inheritance_enabled = true;
 
+    /**
+     * Css class attached to icons in a CMSMain tree. Also supports font-icon set.
+     * Overrides cms_icon for most purposes if set on the same class
+     */
+    private static string $cms_icon_class = 'font-icon-tag';
+
     public function getCMSFields()
     {
         $this->beforeUpdateCMSFields(function (FieldList $fields) {