diff --git a/src/pocketmine/utils/UUID.php b/src/pocketmine/utils/UUID.php
index b645000d1..21432ad1f 100644
--- a/src/pocketmine/utils/UUID.php
+++ b/src/pocketmine/utils/UUID.php
@@ -38,7 +38,9 @@ use function trim;
 
 class UUID{
 
+	/** @var int[] */
 	private $parts;
+	/** @var int */
 	private $version;
 
 	public function __construct(int $part1 = 0, int $part2 = 0, int $part3 = 0, int $part4 = 0, int $version = null){