diff --git a/src/pocketmine/level/format/Chunk.php b/src/pocketmine/level/format/Chunk.php
index b1fcada26..360fe51eb 100644
--- a/src/pocketmine/level/format/Chunk.php
+++ b/src/pocketmine/level/format/Chunk.php
@@ -363,13 +363,11 @@ interface Chunk{
 	public function networkSerialize() : string;
 
 	/**
-	 * Serializes a chunk without compression for use in AsyncTasks.
-	 *
-	 * @param Chunk $chunk
+	 * Serializes the chunk without compression for use in AsyncTasks.
 	 *
 	 * @return string
 	 */
-	public static function fastSerialize(Chunk $chunk) : string;
+	public function fastSerialize() : string;
 
 	/**
 	 * Deserializes a chunk from fast serialization
diff --git a/src/pocketmine/level/format/generic/ChunkRequestTask.php b/src/pocketmine/level/format/generic/ChunkRequestTask.php
index fb5718d5d..d0665a7c8 100644
--- a/src/pocketmine/level/format/generic/ChunkRequestTask.php
+++ b/src/pocketmine/level/format/generic/ChunkRequestTask.php
@@ -21,6 +21,7 @@
 
 namespace pocketmine\level\format\generic;
 
+use pocketmine\level\format\Chunk;
 use pocketmine\level\Level;
 use pocketmine\nbt\NBT;
 use pocketmine\scheduler\AsyncTask;
@@ -40,7 +41,7 @@ class ChunkRequestTask extends AsyncTask{
 	public function __construct(Level $level, Chunk $chunk){
 		$this->levelId = $level->getId();
 
-		$this->chunk = GenericChunk::fastSerialize($chunk);
+		$this->chunk = $chunk->fastSerialize();
 		$this->chunkX = $chunk->getX();
 		$this->chunkZ = $chunk->getZ();
 
diff --git a/src/pocketmine/level/format/generic/GenericChunk.php b/src/pocketmine/level/format/generic/GenericChunk.php
index b05c47bc2..7ba53fbbc 100644
--- a/src/pocketmine/level/format/generic/GenericChunk.php
+++ b/src/pocketmine/level/format/generic/GenericChunk.php
@@ -621,13 +621,13 @@ class GenericChunk implements Chunk{
 		return $result;
 	}
 
-	public static function fastSerialize(Chunk $chunk) : string{
+	public function fastSerialize() : string{
 		$stream = new BinaryStream();
-		$stream->putInt($chunk->x);
-		$stream->putInt($chunk->z);
+		$stream->putInt($this->x);
+		$stream->putInt($this->z);
 		$count = 0;
 		$subChunks = "";
-		foreach($chunk->subChunks as $y => $subChunk){
+		foreach($this->subChunks as $y => $subChunk){
 			if($subChunk instanceof EmptySubChunk){
 				continue;
 			}
@@ -636,9 +636,9 @@ class GenericChunk implements Chunk{
 		}
 		$stream->putByte($count);
 		$stream->put($subChunks);
-		$stream->put(pack("C*", ...$chunk->getHeightMapArray()) .
-			$chunk->getBiomeIdArray() .
-			chr(($chunk->lightPopulated ? 1 << 2 : 0) | ($chunk->terrainPopulated ? 1 << 1 : 0) | ($chunk->terrainGenerated ? 1 : 0)));
+		$stream->put(pack("C*", ...$this->heightMap) .
+			$this->biomeIds .
+			chr(($this->lightPopulated ? 1 << 2 : 0) | ($this->terrainPopulated ? 1 << 1 : 0) | ($this->terrainGenerated ? 1 : 0)));
 		//TODO: tiles and entities
 		return $stream->getBuffer();
 	}
diff --git a/src/pocketmine/level/generator/GenerationTask.php b/src/pocketmine/level/generator/GenerationTask.php
index 2684f13d6..1b7e01313 100644
--- a/src/pocketmine/level/generator/GenerationTask.php
+++ b/src/pocketmine/level/generator/GenerationTask.php
@@ -33,13 +33,11 @@ class GenerationTask extends AsyncTask{
 	public $state;
 	public $levelId;
 	public $chunk;
-	public $chunkClass;
 
 	public function __construct(Level $level, Chunk $chunk){
 		$this->state = true;
 		$this->levelId = $level->getId();
-		$this->chunk = GenericChunk::fastSerialize($chunk);
-		$this->chunkClass = get_class($chunk);
+		$this->chunk = $chunk->fastSerialize();
 	}
 
 	public function onRun(){
@@ -65,7 +63,7 @@ class GenerationTask extends AsyncTask{
 
 		$chunk = $manager->getChunk($chunk->getX(), $chunk->getZ());
 		$chunk->setGenerated();
-		$this->chunk = GenericChunk::fastSerialize($chunk);
+		$this->chunk = $chunk->fastSerialize();
 
 		$manager->setChunk($chunk->getX(), $chunk->getZ(), null);
 	}
diff --git a/src/pocketmine/level/generator/LightPopulationTask.php b/src/pocketmine/level/generator/LightPopulationTask.php
index e6540610c..931404c95 100644
--- a/src/pocketmine/level/generator/LightPopulationTask.php
+++ b/src/pocketmine/level/generator/LightPopulationTask.php
@@ -31,12 +31,10 @@ class LightPopulationTask extends AsyncTask{
 
 	public $levelId;
 	public $chunk;
-	public $chunkClass;
 
 	public function __construct(Level $level, Chunk $chunk){
 		$this->levelId = $level->getId();
-		$this->chunk = GenericChunk::fastDeserialize($this->chunk);
-		$this->chunkClass = get_class($chunk);
+		$this->chunk = $chunk->fastSerialize();
 	}
 
 	public function onRun(){
@@ -51,7 +49,7 @@ class LightPopulationTask extends AsyncTask{
 		$chunk->populateSkyLight();
 		$chunk->setLightPopulated();
 
-		$this->chunk = GenericChunk::fastSerialize($chunk);
+		$this->chunk = $chunk->fastSerialize();
 	}
 
 	public function onCompletion(Server $server){
diff --git a/src/pocketmine/level/generator/PopulationTask.php b/src/pocketmine/level/generator/PopulationTask.php
index 869a5fa85..167ba783c 100644
--- a/src/pocketmine/level/generator/PopulationTask.php
+++ b/src/pocketmine/level/generator/PopulationTask.php
@@ -47,7 +47,7 @@ class PopulationTask extends AsyncTask{
 	public function __construct(Level $level, Chunk $chunk){
 		$this->state = true;
 		$this->levelId = $level->getId();
-		$this->chunk = GenericChunk::fastSerialize($chunk);
+		$this->chunk = $chunk->fastSerialize();
 
 		for($i = 0; $i < 9; ++$i){
 			if($i === 4){
@@ -56,7 +56,7 @@ class PopulationTask extends AsyncTask{
 			$xx = -1 + $i % 3;
 			$zz = -1 + (int) ($i / 3);
 			$ck = $level->getChunk($chunk->getX() + $xx, $chunk->getZ() + $zz, false);
-			$this->{"chunk$i"} = $ck !== null ? GenericChunk::fastSerialize($ck) : null;
+			$this->{"chunk$i"} = $ck !== null ? $ck->fastSerialize() : null;
 		}
 	}
 
@@ -118,7 +118,7 @@ class PopulationTask extends AsyncTask{
 		$chunk->populateSkyLight();
 		$chunk->setLightPopulated();
 		$chunk->setPopulated();
-		$this->chunk = GenericChunk::fastSerialize($chunk);
+		$this->chunk = $chunk->fastSerialize();
 
 		$manager->setChunk($chunk->getX(), $chunk->getZ(), null);
 
@@ -141,7 +141,7 @@ class PopulationTask extends AsyncTask{
 				continue;
 			}
 
-			$this->{"chunk$i"} = $chunks[$i] !== null ? GenericChunk::fastSerialize($chunks[$i]) : null;
+			$this->{"chunk$i"} = $chunks[$i] !== null ? $chunks[$i]->fastSerialize() : null;
 		}
 	}