diff --git a/src/pocketmine/inventory/BaseInventory.php b/src/pocketmine/inventory/BaseInventory.php
index fd1663801..abdff4ea8 100644
--- a/src/pocketmine/inventory/BaseInventory.php
+++ b/src/pocketmine/inventory/BaseInventory.php
@@ -103,7 +103,7 @@ abstract class BaseInventory implements Inventory{
 	}
 
 	public function getContents() : array{
-		return $this->slots->toArray();
+		return array_filter($this->slots->toArray(), function(Item $item = null){ return $item !== null; });
 	}
 
 	/**