diff --git a/src/pocketmine/inventory/BaseInventory.php b/src/pocketmine/inventory/BaseInventory.php
index 2275cb6ae..98781b5a5 100644
--- a/src/pocketmine/inventory/BaseInventory.php
+++ b/src/pocketmine/inventory/BaseInventory.php
@@ -103,7 +103,7 @@ abstract class BaseInventory implements Inventory{
 	}
 
 	public function getItem($index){
-		return isset($this->slots[$index]) ? clone $this->slots[$index] : Item::get(Item::AIR, null, 0);
+		return isset($this->slots[$index]) ? clone $this->slots[$index] : Item::get(Item::AIR, 0, 0);
 	}
 
 	public function getContents(){
@@ -343,7 +343,7 @@ abstract class BaseInventory implements Inventory{
 
 	public function clear($index){
 		if(isset($this->slots[$index])){
-			$item = Item::get(Item::AIR, null, 0);
+			$item = Item::get(Item::AIR, 0, 0);
 			$old = $this->slots[$index];
 			$holder = $this->getHolder();
 			if($holder instanceof Entity){
diff --git a/src/pocketmine/inventory/PlayerInventory.php b/src/pocketmine/inventory/PlayerInventory.php
index 825842dc2..f0546898b 100644
--- a/src/pocketmine/inventory/PlayerInventory.php
+++ b/src/pocketmine/inventory/PlayerInventory.php
@@ -238,7 +238,7 @@ class PlayerInventory extends BaseInventory{
 
 	public function clear($index){
 		if(isset($this->slots[$index])){
-			$item = Item::get(Item::AIR, null, 0);
+			$item = Item::get(Item::AIR, 0, 0);
 			$old = $this->slots[$index];
 			if($index >= $this->getSize() and $index < $this->size){ //Armor change
 				Server::getInstance()->getPluginManager()->callEvent($ev = new EntityArmorChangeEvent($this->getHolder(), $old, $item, $index));
@@ -329,7 +329,7 @@ class PlayerInventory extends BaseInventory{
 	public function setArmorContents(array $items){
 		for($i = 0; $i < 4; ++$i){
 			if(!isset($items[$i]) or !($items[$i] instanceof Item)){
-				$items[$i] = Item::get(Item::AIR, null, 0);
+				$items[$i] = Item::get(Item::AIR, 0, 0);
 			}
 
 			if($items[$i]->getId() === Item::AIR){