core/modules/system/src/Controller/DbUpdateController.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/core/modules/system/src/Controller/DbUpdateController.php b/core/modules/system/src/Controller/DbUpdateController.php
index f378631..82787f0 100644
--- a/core/modules/system/src/Controller/DbUpdateController.php
+++ b/core/modules/system/src/Controller/DbUpdateController.php
@@ -218,7 +218,9 @@ protected function info(Request $request) {
 
     $info[] = $this->t("<strong>Back up your code</strong>. Hint: when backing up module code, do not leave that backup in the 'modules' or 'sites/*/modules' directories as this may confuse Drupal's auto-discovery mechanism.");
     $info[] = $this->t('Put your site into <a href=":url">maintenance mode</a>.', array(
-      ':url' => Url::fromRoute('system.site_maintenance_mode')->toString(TRUE)->getGeneratedUrl(),
+      // @todo Change to Url::fromRoute('system.site_maintenance_mode') once
+      // https://www.drupal.org/node/2548095 is in.
+      ':url' => Url::fromUri('base://../admin/config/development/maintenance')->toString(TRUE)->getGeneratedUrl(),
     ));
     $info[] = $this->t('<strong>Back up your database</strong>. This process will change your database values and in case of emergency you may need to revert to a backup.');
     $info[] = $this->t('Install your new files in the appropriate location, as described in the handbook.');