diff --git a/src/Symfony/Component/Filesystem/Filesystem.php b/src/Symfony/Component/Filesystem/Filesystem.php
index cd456c7848..7d7301c3a1 100644
--- a/src/Symfony/Component/Filesystem/Filesystem.php
+++ b/src/Symfony/Component/Filesystem/Filesystem.php
@@ -211,7 +211,7 @@ class Filesystem
      * Change the owner of an array of files or directories.
      *
      * @param string|iterable $files     A filename, an array of files, or a \Traversable instance to change owner
-     * @param string          $user      The new owner user name
+     * @param string|int      $user      A user name or number
      * @param bool            $recursive Whether change the owner recursively or not
      *
      * @throws IOException When the change fails
@@ -238,7 +238,7 @@ class Filesystem
      * Change the group of an array of files or directories.
      *
      * @param string|iterable $files     A filename, an array of files, or a \Traversable instance to change group
-     * @param string          $group     The group name
+     * @param string|int      $group     A group name or number
      * @param bool            $recursive Whether change the group recursively or not
      *
      * @throws IOException When the change fails