diff --git a/src/pocketmine/network/mcpe/RakLibInterface.php b/src/pocketmine/network/mcpe/RakLibInterface.php
index 77d4146ce2..8d9b888b85 100644
--- a/src/pocketmine/network/mcpe/RakLibInterface.php
+++ b/src/pocketmine/network/mcpe/RakLibInterface.php
@@ -54,7 +54,7 @@ class RakLibInterface implements ServerInstance, AdvancedSourceInterface{
 	private $players = [];
 
 	/** @var string[] */
-	private $identifiers;
+	private $identifiers = [];
 
 	/** @var int[] */
 	private $identifiersACK = [];
@@ -63,9 +63,7 @@ class RakLibInterface implements ServerInstance, AdvancedSourceInterface{
 	private $interface;
 
 	public function __construct(Server $server){
-
 		$this->server = $server;
-		$this->identifiers = [];
 
 		$this->rakLib = new RakLibServer($this->server->getLogger(), $this->server->getLoader(), $this->server->getPort(), $this->server->getIp() === "" ? "0.0.0.0" : $this->server->getIp(), false);
 		$this->interface = new ServerHandler($this->rakLib, $this);