diff --git a/src/data/bedrock/block/upgrade/BlockStateUpgrader.php b/src/data/bedrock/block/upgrade/BlockStateUpgrader.php
index 949bd27b1..16c58fb27 100644
--- a/src/data/bedrock/block/upgrade/BlockStateUpgrader.php
+++ b/src/data/bedrock/block/upgrade/BlockStateUpgrader.php
@@ -28,6 +28,7 @@ use pocketmine\nbt\tag\Tag;
 use pocketmine\utils\Utils;
 use function count;
 use function ksort;
+use function max;
 use const SORT_NUMERIC;
 
 final class BlockStateUpgrader{