diff --git a/src/pocketmine/entity/Zombie.php b/src/pocketmine/entity/Zombie.php
index 243ea7a5f8..0061439ef8 100644
--- a/src/pocketmine/entity/Zombie.php
+++ b/src/pocketmine/entity/Zombie.php
@@ -83,7 +83,7 @@ class Zombie extends Monster{
 
 	public function getDrops(){
 		$drops = [
-			ItemItem::get(Item::FEATHER, 0, 1)
+			ItemItem::get(ItemItem::FEATHER, 0, 1)
 		];
 		if($this->lastDamageCause instanceof EntityDamageByEntityEvent and $this->lastDamageCause->getEntity() instanceof Player){
 			if(mt_rand(0, 199) < 5){