diff --git a/src/pocketmine/block/DoubleSlab.php b/src/pocketmine/block/DoubleSlab.php
index e85c1dee0..038f0f5bc 100644
--- a/src/pocketmine/block/DoubleSlab.php
+++ b/src/pocketmine/block/DoubleSlab.php
@@ -34,6 +34,7 @@ class DoubleSlab extends Solid{
 			4 => "Brick",
 			5 => "Stone Brick",
 			6 => "Quartz",
+			7 => "",
 		];
 		$this->name = "Double " . $names[$this->meta & 0x07] . " Slab";
 		$this->hardness = 30;
diff --git a/src/pocketmine/level/Level.php b/src/pocketmine/level/Level.php
index 96a55b57d..2564e0265 100644
--- a/src/pocketmine/level/Level.php
+++ b/src/pocketmine/level/Level.php
@@ -635,7 +635,7 @@ class Level implements ChunkManager, Metadatable{
 			$this->chunkTickList = [];
 		}
 	}
-	
+
 	public function __debugInfo(){
 		return get_class($this);
 	}