diff --git a/core/lib/Drupal/Core/Database/Connection.php b/core/lib/Drupal/Core/Database/Connection.php
index 66a4722..c170814 100644
--- a/core/lib/Drupal/Core/Database/Connection.php
+++ b/core/lib/Drupal/Core/Database/Connection.php
@@ -23,7 +23,7 @@
  *
  * @see http://php.net/manual/book.pdo.php
  */
-abstract class Connection {
+abstract class Connection implements \Serializable {
 
   /**
    * The database target this connection is for.
@@ -1209,7 +1209,8 @@ public function commit() {
    *   attribute values for the PDOStatement object that this method returns.
    *   You would most commonly use this to set the \PDO::ATTR_CURSOR value to
    *   \PDO::CURSOR_SCROLL to request a scrollable cursor. Some drivers have
-   *   driver specific options that may be set at prepare-time.
+   *   driver specific options that may be set at prepare-time. Defaults to an
+   *   empty array.
    *
    * @return \PDOStatement|false
    *   If the database server successfully prepares the statement, returns a
@@ -1221,7 +1222,7 @@ public function commit() {
    *
    * @see \PDO::prepare()
    */
-  public function prepare($statement, array $driver_options = NULL) {
+  public function prepare($statement, array $driver_options = array()) {
     return $this->connection->prepare($statement, $driver_options);
   }
 
@@ -1232,7 +1233,7 @@ public function prepare($statement, array $driver_options = NULL) {
    *   The string to be quoted.
    * @param int $parameter_type
    *   (optional) Provides a data type hint for drivers that have alternate
-   *   quoting styles.
+   *   quoting styles. Defaults to \PDO::PARAM_STR.
    *
    * @return string|bool
    *   A quoted string that is theoretically safe to pass into an SQL statement.
@@ -1244,4 +1245,21 @@ public function quote($string, $parameter_type = \PDO::PARAM_STR) {
     return $this->connection->quote($string, $parameter_type);
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function serialize() {
+    return serialize(array($this->target, $this->key));
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function unserialize($serialized) {
+    list($target, $key) = unserialize($serialized);
+    foreach (get_object_vars(Database::getConnection($target, $key)) as $name => $value) {
+      $this->{$name} = $value;
+    }
+  }
+
 }
diff --git a/core/modules/system/lib/Drupal/system/Tests/Database/ConnectionTest.php b/core/modules/system/lib/Drupal/system/Tests/Database/ConnectionTest.php
index 8bdc45e..983a539 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Database/ConnectionTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Database/ConnectionTest.php
@@ -123,4 +123,16 @@ function testConnectionOptions() {
     $connectionOptions = $db->getConnectionOptions();
     $this->assertNotEqual($connection_info['default']['database'], $connectionOptions['database'], 'The test connection info database does not match the current connection options database.');
   }
+
+  /**
+   * Tests the serialization and deserialization of a database connection.
+   */
+  function testConnectionSerialization() {
+    $db = Database::getConnection('default', 'default');
+
+    $serialized = serialize($db);
+    $deserialized = unserialize($serialized);
+
+    $this->assertIdenticalObject($db, $deserialized, 'Serializing and deserializing a connection returns an identical object.');
+  }
 }