diff --git a/src/data/runtime/block/BlockDataReader.php b/src/data/runtime/block/BlockDataReader.php
index 5434c05b4..5164ff53e 100644
--- a/src/data/runtime/block/BlockDataReader.php
+++ b/src/data/runtime/block/BlockDataReader.php
@@ -23,6 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\data\runtime\block;
 
+use pocketmine\block\utils\InvalidBlockStateException;
 use pocketmine\block\utils\WallConnectionType;
 use pocketmine\math\Axis;
 use pocketmine\math\Facing;