diff --git a/src/AbstractParser.php b/src/AbstractParser.php
index 9308c26..eadb2d8 100644
--- a/src/AbstractParser.php
+++ b/src/AbstractParser.php
@@ -41,8 +41,6 @@ protected function __construct(
         protected array $anonymous,
     )
     {
-        // init built in types
-        self::$BUILTIN_TYPES ??= self::getBuiltInTypes();
         // Set number of tokens
         $this->count = count($tokens);
     }
@@ -357,4 +355,9 @@ private static function getBuiltInTypes(): array
 
         return $types;
     }
+
+    final public static function init(): void
+    {
+        self::$BUILTIN_TYPES ??= self::getBuiltInTypes();
+    }
 }
\ No newline at end of file
diff --git a/src/AnonymousClassInfo.php b/src/AnonymousClassInfo.php
index 3f553f7..6bc7878 100644
--- a/src/AnonymousClassInfo.php
+++ b/src/AnonymousClassInfo.php
@@ -5,13 +5,16 @@
 #[Attribute\PreventBoxing]
 final class AnonymousClassInfo extends AbstractInfo
 {
-    public const PLACEHOLDER = "\x07{opis\x06class\x05name}\x07";
+    public const PLACEHOLDER = "\x07opis\x06anonymous＠class\x05name\x07";
 
     /**
      * @var string Original class namespace
      */
     private string $ns;
 
+    /**
+     * @var bool True if class was loaded
+     */
     private bool $loaded = false;
 
     public function __construct(string $header, string $body, string $ns = '')
diff --git a/src/AnonymousClassParser.php b/src/AnonymousClassParser.php
index f6a82d4..86931b6 100644
--- a/src/AnonymousClassParser.php
+++ b/src/AnonymousClassParser.php
@@ -7,8 +7,6 @@
  */
 final class AnonymousClassParser extends AbstractParser
 {
-    private const MATCH_PARAMS_OR_BODY = ['(', '{'];
-
     private int $last = -1;
 
     protected function __construct(
diff --git a/src/Serializer.php b/src/Serializer.php
index 30a1cee..ebb7677 100644
--- a/src/Serializer.php
+++ b/src/Serializer.php
@@ -44,6 +44,9 @@ public static function init(
             }
         }
 
+        // Init parser
+        AbstractParser::init();
+
         // Init code stream protocol
         CodeStream::init([ClosureInfo::class, AnonymousClassInfo::class]);