diff --git a/Pilot.php b/Pilot.php
index 9b679ee..4b9c3f4 100644
--- a/Pilot.php
+++ b/Pilot.php
@@ -50,6 +50,9 @@
  */
 class Pilot
 {
+    /**
+     * @var int
+     */
     private static int $counter = -1;
     /**
      * @var string