diff --git a/src/pocketmine/block/IronTrapdoor.php b/src/pocketmine/block/IronTrapdoor.php
index b23d2a225..c2844d51b 100644
--- a/src/pocketmine/block/IronTrapdoor.php
+++ b/src/pocketmine/block/IronTrapdoor.php
@@ -24,6 +24,7 @@ namespace pocketmine\block;
 use pocketmine\item\Item;
 use pocketmine\item\Tool;
 use pocketmine\math\AxisAlignedBB;
+use pocketmine\level\sound\DoorSound;
 use pocketmine\Player;
 
 class IronTrapdoor extends Transparent{
@@ -153,4 +154,4 @@ class IronTrapdoor extends Transparent{
 	public function getToolType(){
 		return Tool::TYPE_PICKAXE;
 	}
-}
\ No newline at end of file
+}