diff --git a/core/lib/Drupal/Core/KeyValueStore/DatabaseStorageExpirable.php b/core/lib/Drupal/Core/KeyValueStore/DatabaseStorageExpirable.php
index 8c99eb1..5c8366b 100644
--- a/core/lib/Drupal/Core/KeyValueStore/DatabaseStorageExpirable.php
+++ b/core/lib/Drupal/Core/KeyValueStore/DatabaseStorageExpirable.php
@@ -92,13 +92,13 @@ function setWithExpire($key, $value, $time_to_live) {
   /**
    * Implements Drupal\Core\KeyValueStore\KeyValueStoreExpirableInterface::setWithExpireIfNotExists().
    */
-  function setWithExpireIfNotExists($key, $value, $expire) {
+  function setWithExpireIfNotExists($key, $value, $time_to_live) {
     $result = $this->connection->merge($this->table)
       ->insertFields(array(
         'collection' => $this->collection,
         'name' => $key,
         'value' => $this->serializer->encode($value),
-        'expire' => REQUEST_TIME + $expire,
+        'expire' => REQUEST_TIME + $time_to_live,
       ))
       ->condition('collection', $this->collection)
       ->condition('name', $key)
@@ -109,9 +109,9 @@ function setWithExpireIfNotExists($key, $value, $expire) {
   /**
    * {@inheritdoc}
    */
-  function setMultipleWithExpire(array $data, $expire) {
+  function setMultipleWithExpire(array $data, $time_to_live) {
     foreach ($data as $key => $value) {
-      $this->setWithExpire($key, $value, $expire);
+      $this->setWithExpire($key, $value, $time_to_live);
     }
   }
 
diff --git a/core/lib/Drupal/Core/KeyValueStore/KeyValueStoreExpirableInterface.php b/core/lib/Drupal/Core/KeyValueStore/KeyValueStoreExpirableInterface.php
index 08a02b8..1fef683 100644
--- a/core/lib/Drupal/Core/KeyValueStore/KeyValueStoreExpirableInterface.php
+++ b/core/lib/Drupal/Core/KeyValueStore/KeyValueStoreExpirableInterface.php
@@ -31,22 +31,22 @@ public function setWithExpire($key, $value, $time_to_live);
    *   The key of the data to store.
    * @param mixed $value
    *   The data to store.
-   * @param int $expire
+   * @param int $time_to_live
    *   The time to live for items, in seconds.
    *
    * @return bool
    *   TRUE if the data was set, or FALSE if it already existed.
    */
-  public function setWithExpireIfNotExists($key, $value, $expire);
+  public function setWithExpireIfNotExists($key, $value, $time_to_live);
 
   /**
    * Saves an array of values with a time to live.
    *
    * @param array $data
    *   An array of data to store.
-   * @param int $expire
+   * @param int $time_to_live
    *   The time to live for items, in seconds.
    */
-  public function setMultipleWithExpire(array $data, $expire);
+  public function setMultipleWithExpire(array $data, $time_to_live);
 
 }
diff --git a/core/lib/Drupal/Core/KeyValueStore/NullStorageExpirable.php b/core/lib/Drupal/Core/KeyValueStore/NullStorageExpirable.php
index ca9d355..109f8fc 100644
--- a/core/lib/Drupal/Core/KeyValueStore/NullStorageExpirable.php
+++ b/core/lib/Drupal/Core/KeyValueStore/NullStorageExpirable.php
@@ -107,7 +107,7 @@ public function getCollectionName() {
   /**
    * Implements Drupal\Core\KeyValueStore\KeyValueStoreExpirableInterface::setMultipleWithExpire().
    */
-  public function setMultipleWithExpire(array $data, $expire) { }
+  public function setMultipleWithExpire(array $data, $time_to_live) { }
 
   /**
    * Implements Drupal\Core\KeyValueStore\KeyValueStoreExpirableInterface::setWithExpire().
@@ -117,6 +117,6 @@ public function setWithExpire($key, $value, $time_to_live) { }
   /**
    * Implements Drupal\Core\KeyValueStore\KeyValueStoreExpirableInterface::setWithExpireIfNotExists().
    */
-  public function setWithExpireIfNotExists($key, $value, $expire) { }
+  public function setWithExpireIfNotExists($key, $value, $time_to_live) { }
 
 }