diff --git a/src/pocketmine/item/ItemFactory.php b/src/pocketmine/item/ItemFactory.php
index d9e3507dc..19433e68e 100644
--- a/src/pocketmine/item/ItemFactory.php
+++ b/src/pocketmine/item/ItemFactory.php
@@ -353,8 +353,8 @@ class ItemFactory{
 				$meta = $b[1] & 0xFFFF;
 			}
 
-			if(defined(Item::class . "::" . strtoupper($b[0]))){
-				$item = self::get(constant(Item::class . "::" . strtoupper($b[0])), $meta);
+			if(defined(ItemIds::class . "::" . strtoupper($b[0]))){
+				$item = self::get(constant(ItemIds::class . "::" . strtoupper($b[0])), $meta);
 			}elseif(is_numeric($b[0])){
 				$item = self::get(((int) $b[0]) & 0xFFFF, $meta);
 			}else{