diff --git a/src/pocketmine/level/generator/noise/Noise.php b/src/pocketmine/level/generator/noise/Noise.php
index 78b790320..4b51180b2 100644
--- a/src/pocketmine/level/generator/noise/Noise.php
+++ b/src/pocketmine/level/generator/noise/Noise.php
@@ -28,13 +28,7 @@ namespace pocketmine\level\generator\noise;
 
 
 abstract class Noise{
-	protected $perm = [];
-	protected $offsetX = 0;
-	protected $offsetY = 0;
-	protected $offsetZ = 0;
-	protected $octaves = 8;
-	protected $persistence;
-	protected $expansion;
+
 
 	public static function linearLerp($x, $x1, $x2, $q0, $q1){
 		return (($x2 - $x) / ($x2 - $x1)) * $q0 + (($x - $x1) / ($x2 - $x1)) * $q1;
@@ -72,6 +66,19 @@ abstract class Noise{
 		);
 	}
 
+	/** @var float */
+	protected $persistence;
+	/** @var float */
+	protected $expansion;
+	/** @var int */
+	protected $octaves;
+
+	public function __construct(int $octaves, float $persistence, float $expansion){
+		$this->octaves = $octaves;
+		$this->persistence = $persistence;
+		$this->expansion = $expansion;
+	}
+
 	abstract public function getNoise2D($x, $z);
 
 	abstract public function getNoise3D($x, $y, $z);
diff --git a/src/pocketmine/level/generator/noise/Simplex.php b/src/pocketmine/level/generator/noise/Simplex.php
index d96070bb9..846d45566 100644
--- a/src/pocketmine/level/generator/noise/Simplex.php
+++ b/src/pocketmine/level/generator/noise/Simplex.php
@@ -45,10 +45,18 @@ class Simplex extends Noise{
 	protected const F3 = 1.0 / 3.0;
 	protected const G3 = 1.0 / 6.0;
 
-	public function __construct(Random $random, $octaves, $persistence, $expansion = 1){
-		$this->octaves = $octaves;
-		$this->persistence = $persistence;
-		$this->expansion = $expansion;
+	/** @var float */
+	protected $offsetX;
+	/** @var float */
+	protected $offsetZ;
+	/** @var float */
+	protected $offsetY;
+	/** @var int[] */
+	protected $perm = [];
+
+	public function __construct(Random $random, int $octaves, float $persistence, float $expansion){
+		parent::__construct($octaves, $persistence, $expansion);
+
 		$this->offsetX = $random->nextFloat() * 256;
 		$this->offsetY = $random->nextFloat() * 256;
 		$this->offsetZ = $random->nextFloat() * 256;