diff -u b/core/includes/theme.inc b/core/includes/theme.inc
--- b/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -1975,7 +1975,7 @@
   $body_classes[] = $variables['logged_in'] ? 'user-logged-in' : '';
   // Add a class that tells us what path the page is located make it possible to theme
   // the page depending on the current path (e.g. node, admin, user,
-  // etc.) as well as more specific data like path--node-12 or path--node-edit.
+  // etc.) as well as more specific data like path--frontpage or path--contenttype.
 
   // Add a class that tells us where in the path we are
   $path = arg();
@@ -2242,8 +2242,7 @@
   $page_object = $variables['page']['#page'];
   $attributes = $page_object->getBodyAttributes();
   $classes = $attributes['class'];
-  $classes[] = 'page-maintenance';
-  $classes[] = 'page-maintenance--active';
+  $classes[] = 'page--maintenance';
   if (isset($variables['db_is_active']) && !$variables['db_is_active']) {
     $classes[] = 'db-offline';
   }