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diff --git a/web/core/lib/Drupal/Core/Queue/QueueInterface.php b/web/core/lib/Drupal/Core/Queue/QueueInterface.php
index 6d8622449..83f3ef709 100644
--- a/web/core/lib/Drupal/Core/Queue/QueueInterface.php
+++ b/web/core/lib/Drupal/Core/Queue/QueueInterface.php
@@ -37,7 +37,7 @@ interface QueueInterface {
    * result might only be valid for a fraction of a second and not provide an
    * accurate representation.
    *
-   * @return
+   * @return int
    *   An integer estimate of the number of items in the queue.
    */
   public function numberOfItems();