diff --git a/core/includes/config.inc b/core/includes/config.inc
index b033f5e..4b4538a 100644
--- a/core/includes/config.inc
+++ b/core/includes/config.inc
@@ -4,6 +4,7 @@
 use Drupal\Core\Config\FileStorage;
 use Drupal\Core\Config\NullStorage;
 use Drupal\Core\Config\StorageInterface;
+use Drupal\Core\Config\Entity\ConfigStorageController;
 
 /**
  * @file
@@ -35,7 +36,7 @@ function config_install_default_config($type, $name) {
       $manifest_config = config('manifest.' . $entity_info['config_prefix']);
       $manifest_data = array();
       foreach ($source_storage->listAll($entity_info['config_prefix']) as $config_name) {
-        $id = substr($config_name, strlen($entity_info['config_prefix'] . '.'));
+        $id = ConfigStorageController::extractID($config_name, $entity_info['config_prefix']);
         $manifest_data[$id]['name'] = $config_name;
       }
       $manifest_config->setData($manifest_data)->save();
diff --git a/core/lib/Drupal/Core/Config/Entity/ConfigStorageController.php b/core/lib/Drupal/Core/Config/Entity/ConfigStorageController.php
index 8700db6..ab3f4c3 100644
--- a/core/lib/Drupal/Core/Config/Entity/ConfigStorageController.php
+++ b/core/lib/Drupal/Core/Config/Entity/ConfigStorageController.php
@@ -148,6 +148,22 @@ public function getConfigPrefix() {
   }
 
   /**
+   * Extracts the configuration entity ID from the full configuration name.
+   *
+   * @param string $config_name
+   *   The full configuration name to extract the ID from. E.g.
+   *   'views.view.archive'.
+   * @param string $config_prefix
+   *   The config prefix of the configuration entity. E.g. 'views.view'
+   *
+   * @return string
+   *   The ID of the configuration entity.
+   */
+  public static function extractID($config_name, $config_prefix) {
+    return substr($config_name, strlen($config_prefix . '.'));
+  }
+
+  /**
    * Builds the query to load the entity.
    *
    * This has full revision support. For entities requiring special queries,
diff --git a/core/modules/config/lib/Drupal/config/Tests/ConfigEntityUnitTest.php b/core/modules/config/lib/Drupal/config/Tests/ConfigEntityUnitTest.php
index 32a198a..26f0fde 100644
--- a/core/modules/config/lib/Drupal/config/Tests/ConfigEntityUnitTest.php
+++ b/core/modules/config/lib/Drupal/config/Tests/ConfigEntityUnitTest.php
@@ -8,6 +8,7 @@
 namespace Drupal\config\Tests;
 
 use Drupal\simpletest\DrupalUnitTestBase;
+use Drupal\Core\Config\Entity\ConfigStorageController;
 
 /**
  * Unit tests for configuration controllers and objects.
@@ -38,6 +39,11 @@ public function testStorageControllerMethods() {
 
     $expected = $info['config_prefix'] . '.';
     $this->assertIdentical($controller->getConfigPrefix(), $expected);
+
+    // Test the static extractID() method.
+    $expected_id = 'test_id';
+    $config_name = $info['config_prefix'] . '.' . $expected_id;
+    $this->assertIdentical(ConfigStorageController::extractID($config_name, $info['config_prefix']), $expected_id);
   }
 
 }