diff --git a/src/pocketmine/level/Level.php b/src/pocketmine/level/Level.php
index ccfdc8a09..6532caef0 100644
--- a/src/pocketmine/level/Level.php
+++ b/src/pocketmine/level/Level.php
@@ -268,10 +268,6 @@ class Level implements ChunkManager, Metadatable{
 		return PHP_INT_SIZE === 8 ? (($x & 0xFFFFFFF) << 36) | (($y & Level::Y_MASK) << 28) | ($z & 0xFFFFFFF) : $x . ":" . $y . ":" . $z;
 	}
 
-	public static function chunkBlockHash(int $x, int $y, int $z) : int{
-		return ($x << 12) | ($z << 8) | $y;
-	}
-
 	public static function getBlockXYZ($hash, &$x, &$y, &$z){
 		if(PHP_INT_SIZE === 8){
 			$x = $hash >> 36;
diff --git a/src/pocketmine/level/format/generic/GenericChunk.php b/src/pocketmine/level/format/generic/GenericChunk.php
index 2d0dca2f6..4fa9f255c 100644
--- a/src/pocketmine/level/format/generic/GenericChunk.php
+++ b/src/pocketmine/level/format/generic/GenericChunk.php
@@ -195,14 +195,14 @@ class GenericChunk implements Chunk{
 	}
 
 	public function getBlockExtraData(int $x, int $y, int $z) : int{
-		return $this->extraData[Level::chunkBlockHash($x, $y, $z)] ?? 0;
+		return $this->extraData[GenericChunk::chunkBlockHash($x, $y, $z)] ?? 0;
 	}
 
 	public function setBlockExtraData(int $x, int $y, int $z, int $data){
 		if($data === 0){
-			unset($this->extraData[Level::chunkBlockHash($x, $y, $z)]);
+			unset($this->extraData[GenericChunk::chunkBlockHash($x, $y, $z)]);
 		}else{
-			$this->extraData[Level::chunkBlockHash($x, $y, $z)] = $data;
+			$this->extraData[GenericChunk::chunkBlockHash($x, $y, $z)] = $data;
 		}
 
 		$this->hasChanged = true;
@@ -703,6 +703,20 @@ class GenericChunk implements Chunk{
 		return new GenericChunk($provider, $x, $z);
 	}
 
+	/**
+	 * Creates a block hash from chunk block coordinates. Used for extra data keys in chunk packets.
+	 * @internal
+	 *
+	 * @param int $x 0-15
+	 * @param int $y 0-255
+	 * @param int $z 0-15
+	 *
+	 * @return int
+	 */
+	public static function chunkBlockHash(int $x, int $y, int $z) : int{
+		return ($x << 12) | ($z << 8) | $y;
+	}
+
 	/**
 	 * Re-orders a byte array (YZX -> XZY and vice versa)
 	 *