66f93a00c22def5c43a9967d90a01d2beb645b65 Fix syntax error.
diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index f4300fc..95e08ea 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -2847,7 +2847,7 @@ function template_preprocess_maintenance_page(&$variables) {
   }
 
   foreach (system_region_list($GLOBALS['theme']) as $region_key => $region_name) {
-    if (!isset($variables$region_key])) {
+    if (!isset($variables['page'][$region_key])) {
       $variables['page'][$region_key] = array();
     }
     // Append region content set with drupal_add_region_content() as markup.