diff --git a/src/pocketmine/block/Door.php b/src/pocketmine/block/Door.php
index bea2e6d23..5b97d6ca6 100644
--- a/src/pocketmine/block/Door.php
+++ b/src/pocketmine/block/Door.php
@@ -239,7 +239,7 @@ abstract class Door extends Transparent{
 
 			$this->setDamage($player->getDirection() & 0x03);
 			$this->getLevel()->setBlock($blockReplace, $this, true, true); //Bottom
-			$this->getLevel()->setBlock($blockUp, $b = BlockFactory::get($this->getId(), $metaUp), true); //Top
+			$this->getLevel()->setBlock($blockUp, BlockFactory::get($this->getId(), $metaUp), true); //Top
 			return true;
 		}