diff --git a/src/pocketmine/level/format/anvil/Chunk.php b/src/pocketmine/level/format/anvil/Chunk.php
index 7d9507e35..4f1298b27 100644
--- a/src/pocketmine/level/format/anvil/Chunk.php
+++ b/src/pocketmine/level/format/anvil/Chunk.php
@@ -39,7 +39,7 @@ class Chunk extends BaseChunk{
 	/** @var Compound */
 	protected $nbt;
 
-	public function __construct($level, Compound $nbt){
+	public function __construct($level, Compound $nbt = null){
 		if($nbt === null){
 			$this->provider = $level;
 			$this->nbt = new Compound("Level", []);