diff --git a/src/Annotations/AbstractAnnotation.php b/src/Annotations/AbstractAnnotation.php
index 227bc21e6..bd3cc9948 100644
--- a/src/Annotations/AbstractAnnotation.php
+++ b/src/Annotations/AbstractAnnotation.php
@@ -251,6 +251,8 @@ public function mergeProperties($object): void
 
     /**
      * Generate the documentation in YAML format.
+     *
+     * @param int-mask-of<Yaml::PARSE_*>|null $flags A bit field of PARSE_* constants to customize the YAML parser behavior
      */
     public function toYaml(?int $flags = null): string
     {