diff --git a/core/lib/Drupal/Core/Cache/RefinableCacheableDependencyInterface.php b/core/lib/Drupal/Core/Cache/RefinableCacheableDependencyInterface.php
index 11e1584..d3dad65 100644
--- a/core/lib/Drupal/Core/Cache/RefinableCacheableDependencyInterface.php
+++ b/core/lib/Drupal/Core/Cache/RefinableCacheableDependencyInterface.php
@@ -55,7 +55,7 @@ public function mergeCacheMaxAge($max_age);
   /**
    * Adds a dependency on an object: merges its cacheability metadata.
    *
-   * @param \Drupal\Core\Cache\CacheableDependencyInterface|mixed $other_object
+   * @param \Drupal\Core\Cache\CacheableDependencyInterface|object $other_object
    *   The dependency. If the object implements CacheableDependencyInterface,
    *   then its cacheability metadata will be used. Otherwise, the passed in
    *   object must be assumed to be uncacheable, so max-age 0 is set.