diff --git a/src/pocketmine/block/NoteBlock.php b/src/pocketmine/block/NoteBlock.php
index ca0d3c661..cd9c0dc79 100644
--- a/src/pocketmine/block/NoteBlock.php
+++ b/src/pocketmine/block/NoteBlock.php
@@ -46,4 +46,6 @@ class NoteBlock extends Solid{
 	public function getToolType() : int{
 		return BlockToolType::TYPE_AXE;
 	}
+
+	//TODO
 }