diff --git a/core/lib/Drupal/Core/Ajax/CssCommand.php b/core/lib/Drupal/Core/Ajax/CssCommand.php
index af156d5..7abc241 100644
--- a/core/lib/Drupal/Core/Ajax/CssCommand.php
+++ b/core/lib/Drupal/Core/Ajax/CssCommand.php
@@ -62,8 +62,8 @@ public function __construct($selector, array $css = array()) {
    * @param $value
    *   The new value of the CSS property.
    *
-   * @return $this
-   *   The property/value pair.
+   * @return Drupal\Core\Ajax\CommandInterface
+   *   The called command.
    */
   public function setProperty($property, $value) {
     $this->css[$property] = $value;