diff --git a/core/lib/Drupal/Core/Render/Element/OperationsSplitbutton.php b/core/lib/Drupal/Core/Render/Element/OperationsSplitbutton.php
index f9221d18c7..9a0f36a042 100644
--- a/core/lib/Drupal/Core/Render/Element/OperationsSplitbutton.php
+++ b/core/lib/Drupal/Core/Render/Element/OperationsSplitbutton.php
@@ -7,7 +7,7 @@
  *
  * @todo Class comment.
  *
- * @see \Drupal\Core\Render\Element\Splitbutton.
+ * @see \Drupal\Core\Render\Element\Splitbutton
  *
  * @RenderElement("splitbutton_operations")
  */
@@ -16,7 +16,7 @@ class OperationsSplitbutton extends Splitbutton {
   /**
    * {@inheritdoc}
    */
-  public static function preRenderSplitbutton($element) {
+  public static function preRenderSplitbutton(array $element) {
     $element = parent::preRenderSplitbutton($element);
 
     if (($splitbutton_theme_wrapper_key = array_search('splitbutton', $element['#theme_wrappers'])) !== FALSE) {