diff --git a/build/generate-runtime-enum-serializers.php b/build/generate-runtime-enum-serializers.php
index 32429bad20..f3bd39abed 100644
--- a/build/generate-runtime-enum-serializers.php
+++ b/build/generate-runtime-enum-serializers.php
@@ -188,6 +188,25 @@ function printFunctions(array $functions, string $className) : void{
 	echo <<<'HEADER'
 <?php
 
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+ */
+
 declare(strict_types=1);
 
 namespace pocketmine\data\runtime;