diff --git a/phpdotnet/phd/Index.php b/phpdotnet/phd/Index.php
index 39deaca6..4179d3b2 100644
--- a/phpdotnet/phd/Index.php
+++ b/phpdotnet/phd/Index.php
@@ -454,7 +454,7 @@ public function setMembership($membership) {
     public function format_reference($open, $name, $attrs, $props) {
         if (isset($attrs[Reader::XMLNS_DOCBOOK]['role'])) {
             $name = match ($attrs[Reader::XMLNS_DOCBOOK]['role']) {
-                "class" => "phpdoc:classref",
+                "class", "enum" => "phpdoc:classref",
                 "exception" => "phpdoc:exceptionref",
                 default => $name,
             };
diff --git a/phpdotnet/phd/Package/PHP/XHTML.php b/phpdotnet/phd/Package/PHP/XHTML.php
index dcd9c2e5..67d3fe08 100644
--- a/phpdotnet/phd/Package/PHP/XHTML.php
+++ b/phpdotnet/phd/Package/PHP/XHTML.php
@@ -118,6 +118,13 @@ abstract class Package_PHP_XHTML extends Package_Generic_XHTML {
                 'classsynopsis' => 'format_classsynopsis_oo_name_text',
             ]
         ],
+        'enumname' => [
+            /* DEFAULT */ 'format_classname_text',
+            'oointerface' => [
+                /* DEFAULT */     'format_classname_text',
+                'classsynopsis' => 'format_classsynopsis_oo_name_text',
+            ]
+        ],
         'methodname'            => array(
             /* DEFAULT */          'format_function_text',
             'constructorsynopsis' => array(