diff --git a/core/lib/Drupal/Core/Lock/DatabaseLockBackend.php b/core/lib/Drupal/Core/Lock/DatabaseLockBackend.php
index 2024272..89d06a5 100644
--- a/core/lib/Drupal/Core/Lock/DatabaseLockBackend.php
+++ b/core/lib/Drupal/Core/Lock/DatabaseLockBackend.php
@@ -33,6 +33,7 @@ class DatabaseLockBackend extends LockBackendAbstract {
   public function __construct(Connection $database) {
     // __destruct() is causing problems with garbage collections, register a
     // shutdown function instead.
+    parent::__construct();
     drupal_register_shutdown_function(array($this, 'releaseAll'));
     $this->database = $database;
   }
diff --git a/core/lib/Drupal/Core/Lock/LockBackendAbstract.php b/core/lib/Drupal/Core/Lock/LockBackendAbstract.php
index 1b9e194..2ac5651 100644
--- a/core/lib/Drupal/Core/Lock/LockBackendAbstract.php
+++ b/core/lib/Drupal/Core/Lock/LockBackendAbstract.php
@@ -15,6 +15,16 @@
 abstract class LockBackendAbstract implements LockBackendInterface {
 
   /**
+   * Constructs a new lock backend.
+   */
+  public function __construct() {
+    // Locks require a precision of at least 14.
+    if (ini_get('precision') < 14) {
+      ini_set('precision', 14);
+    }
+  }
+
+  /**
    * Current page lock token identifier.
    *
    * @var string