diff --git a/src/data/bedrock/block/convert/BlockObjectToStateSerializer.php b/src/data/bedrock/block/convert/BlockObjectToStateSerializer.php
index 7eba559fe..a11823735 100644
--- a/src/data/bedrock/block/convert/BlockObjectToStateSerializer.php
+++ b/src/data/bedrock/block/convert/BlockObjectToStateSerializer.php
@@ -189,6 +189,7 @@ use pocketmine\data\bedrock\block\convert\BlockStateWriter as Writer;
 use pocketmine\math\Axis;
 use pocketmine\math\Facing;
 use function get_class;
+use function is_callable;
 
 final class BlockObjectToStateSerializer implements BlockStateSerializer{
 	/**