diff --git a/src/pocketmine/Thread.php b/src/pocketmine/Thread.php
index a3d7f41be..347ec62bc 100644
--- a/src/pocketmine/Thread.php
+++ b/src/pocketmine/Thread.php
@@ -28,7 +28,7 @@ namespace pocketmine;
  */
 abstract class Thread extends \Thread{
 
-	/** @var \ClassLoader */
+	/** @var \ClassLoader|null */
 	protected $classLoader;
 	/** @var string|null */
 	protected $composerAutoloaderPath;
diff --git a/src/pocketmine/Worker.php b/src/pocketmine/Worker.php
index fffa93248..f4018ea48 100644
--- a/src/pocketmine/Worker.php
+++ b/src/pocketmine/Worker.php
@@ -28,7 +28,7 @@ namespace pocketmine;
  */
 abstract class Worker extends \Worker{
 
-	/** @var \ClassLoader */
+	/** @var \ClassLoader|null */
 	protected $classLoader;
 	/** @var string|null */
 	protected $composerAutoloaderPath;