diff --git a/core/modules/block/src/Entity/Block.php b/core/modules/block/src/Entity/Block.php
index 96c16a7..7164ee4 100644
--- a/core/modules/block/src/Entity/Block.php
+++ b/core/modules/block/src/Entity/Block.php
@@ -340,7 +340,7 @@ public function setWeight($weight) {
    * @param string $new_id
    *   (optional) Sets a new id on the duplicate block.
    * @param null $new_theme
-   *   (optional) Sets the theme on the duplicate block.
+   *   (optional) Sets a the theme on the duplicate block.
    *
    * @return static
    *   A clone of $this with all identifiers unset, so saving it inserts a new