diff --git a/system/API/ResponseTrait.php b/system/API/ResponseTrait.php
index 6ae0e3a361bd..93dd976eaefb 100644
--- a/system/API/ResponseTrait.php
+++ b/system/API/ResponseTrait.php
@@ -143,7 +143,7 @@ protected function fail($messages, int $status = 400, ?string $code = null, stri
     /**
      * Used after successfully creating a new resource.
      *
-     * @param mixed $data
+     * @param array|string|null $data
      *
      * @return Response
      */
@@ -155,7 +155,7 @@ protected function respondCreated($data = null, string $message = '')
     /**
      * Used after a resource has been successfully deleted.
      *
-     * @param mixed $data
+     * @param array|string|null $data
      *
      * @return Response
      */
@@ -167,7 +167,7 @@ protected function respondDeleted($data = null, string $message = '')
     /**
      * Used after a resource has been successfully updated.
      *
-     * @param mixed $data
+     * @param array|string|null $data
      *
      * @return Response
      */