diff --git a/src/pocketmine/level/sound/LevelEventSound.php b/src/pocketmine/level/sound/LevelEventSound.php
index 615c238ef..710567fa4 100644
--- a/src/pocketmine/level/sound/LevelEventSound.php
+++ b/src/pocketmine/level/sound/LevelEventSound.php
@@ -29,7 +29,7 @@ use pocketmine\network\mcpe\protocol\LevelEventPacket;
 /**
  * @internal
  */
-abstract class LevelEventSound extends Sound{
+abstract class LevelEventSound implements Sound{
 
 	/** @var float */
 	protected $pitch = 0;
diff --git a/src/pocketmine/level/sound/Sound.php b/src/pocketmine/level/sound/Sound.php
index 20b7533ae..83f1ff443 100644
--- a/src/pocketmine/level/sound/Sound.php
+++ b/src/pocketmine/level/sound/Sound.php
@@ -26,13 +26,12 @@ namespace pocketmine\level\sound;
 use pocketmine\math\Vector3;
 use pocketmine\network\mcpe\protocol\ClientboundPacket;
 
-abstract class Sound{
+interface Sound{
 
 	/**
 	 * @param Vector3 $pos
 	 *
 	 * @return ClientboundPacket|ClientboundPacket[]
 	 */
-	abstract public function encode(Vector3 $pos);
-
+	public function encode(Vector3 $pos);
 }