diff --git a/core/modules/system/src/Controller/DbUpdateController.php b/core/modules/system/src/Controller/DbUpdateController.php
index 0239a41..bca6c08 100644
--- a/core/modules/system/src/Controller/DbUpdateController.php
+++ b/core/modules/system/src/Controller/DbUpdateController.php
@@ -222,9 +222,11 @@ 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(),
-    ));
+    if (\Drupal::state()->get('system.maintenance_mode') != TRUE) {
+      $info[] = $this->t('Put your site into <a href=":url">maintenance mode</a>.', array(
+        ':url' => Url::fromRoute('system.site_maintenance_mode')->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.');
     $build['info'] = array(