diff --git a/core/lib/Drupal/Core/Field/WidgetBase.php b/core/lib/Drupal/Core/Field/WidgetBase.php
index 5d25212..90e8f11 100644
--- a/core/lib/Drupal/Core/Field/WidgetBase.php
+++ b/core/lib/Drupal/Core/Field/WidgetBase.php
@@ -178,7 +178,7 @@ protected function formMultipleElements(FieldItemListInterface $items, array &$f
       // table.
       if ($is_multiple) {
         $element = [
-          '#title' => $title . ' ' . t('(value @number)', array('@number' => $delta + 1)),
+          '#title' => $title . ' ' . $this->t('(value @number)', ['@number' => $delta + 1]),
           '#title_display' => 'invisible',
           '#description' => '',
         ];