diff --git a/src/network/mcpe/ChunkRequestTask.php b/src/network/mcpe/ChunkRequestTask.php
index ac07d5321a..05a4f20c10 100644
--- a/src/network/mcpe/ChunkRequestTask.php
+++ b/src/network/mcpe/ChunkRequestTask.php
@@ -37,6 +37,7 @@ use pocketmine\thread\NonThreadSafeValue;
 use pocketmine\utils\BinaryStream;
 use pocketmine\world\format\Chunk;
 use pocketmine\world\format\io\FastChunkSerializer;
+use function chr;
 
 class ChunkRequestTask extends AsyncTask{
 	private const TLS_KEY_PROMISE = "promise";
diff --git a/src/network/mcpe/compression/CompressBatchTask.php b/src/network/mcpe/compression/CompressBatchTask.php
index 44ccef8b0e..a513cfa86c 100644
--- a/src/network/mcpe/compression/CompressBatchTask.php
+++ b/src/network/mcpe/compression/CompressBatchTask.php
@@ -25,6 +25,7 @@ namespace pocketmine\network\mcpe\compression;
 
 use pocketmine\scheduler\AsyncTask;
 use pocketmine\thread\NonThreadSafeValue;
+use function chr;
 
 class CompressBatchTask extends AsyncTask{