diff --git a/core/modules/user/src/TempStore.php b/core/modules/user/src/TempStore.php
index 48aee67..da87691 100644
--- a/core/modules/user/src/TempStore.php
+++ b/core/modules/user/src/TempStore.php
@@ -79,8 +79,10 @@ class TempStore {
    *   The lock object used for this data.
    * @param mixed $owner
    *   The owner key to store along with the data (e.g. a user or session ID).
+   * @param int $expire
+   *   The time to live for items, in seconds.
    */
-  public function __construct(KeyValueStoreExpirableInterface $storage, LockBackendInterface $lockBackend, $owner, $expire) {
+  public function __construct(KeyValueStoreExpirableInterface $storage, LockBackendInterface $lockBackend, $owner, $expire = 604800) {
     $this->storage = $storage;
     $this->lockBackend = $lockBackend;
     $this->owner = $owner;
diff --git a/core/modules/user/src/TempStoreFactory.php b/core/modules/user/src/TempStoreFactory.php
index f1da221..70a9289 100644
--- a/core/modules/user/src/TempStoreFactory.php
+++ b/core/modules/user/src/TempStoreFactory.php
@@ -55,7 +55,7 @@ class TempStoreFactory {
    * @param \Drupal\Core\Lock\LockBackendInterface $lockBackend
    *   The lock object used for this data.
    * @param int $expire
-   *   The
+   *   The time to live for items, in seconds.
    */
   function __construct(SerializationInterface $serializer, Connection $connection, LockBackendInterface $lockBackend, $expire = 604800) {
     $this->serializer = $serializer;