diff --git a/core/lib/Drupal/Core/Form/FormStateInterface.php b/core/lib/Drupal/Core/Form/FormStateInterface.php
index 223cc24c757c2edc0a54361e6ba462cf6b313e6e..b5790cf04a1561d275ac25cb0625308f7017720d 100644
--- a/core/lib/Drupal/Core/Form/FormStateInterface.php
+++ b/core/lib/Drupal/Core/Form/FormStateInterface.php
@@ -210,7 +210,7 @@ public function set($property, $value);
   /**
    * Determines if an arbitrary property is present.
    *
-   * @param string $property
+   * @param string|array $property
    *   Properties are often stored as multi-dimensional associative arrays. If
    *   $property is a string, it will return isset($storage[$property]). If
    *   $property is an array, each element of the array will be used as a nested