diff --git a/kiri-engine/Error/ErrorHandler.php b/kiri-engine/Error/ErrorHandler.php
index 911b263c..037446d5 100644
--- a/kiri-engine/Error/ErrorHandler.php
+++ b/kiri-engine/Error/ErrorHandler.php
@@ -34,6 +34,10 @@ class ErrorHandler extends Component implements ErrorInterface
 	/** @var ?IFormatter $message */
 	private ?IFormatter $message = NULL;
 
+
+	/**
+	 * @var string
+	 */
 	public string $category = 'app';