diff --git a/src/Server.php b/src/Server.php
index fa604d6d9..3aaa1eb2d 100644
--- a/src/Server.php
+++ b/src/Server.php
@@ -1253,7 +1253,9 @@ class Server{
 
 		$stream = PacketBatch::fromPackets(...$ev->getPackets());
 
+		/** @var Compressor[] $compressors */
 		$compressors = [];
+		/** @var NetworkSession[][] $compressorTargets */
 		$compressorTargets = [];
 		foreach($recipients as $recipient){
 			$compressor = $recipient->getCompressor();