diff --git a/modules/cms/classes/Page.php b/modules/cms/classes/Page.php
index 2a4431250..dee5952bc 100644
--- a/modules/cms/classes/Page.php
+++ b/modules/cms/classes/Page.php
@@ -160,6 +160,7 @@ class Page extends CmsCompoundObject
         if ($type == 'cms-page') {
             $theme = Theme::getActiveTheme();
             $pages = self::listInTheme($theme, true);
+            $references = [];
 
             foreach ($pages as $page) {
                 $references[$page->getBaseFileName()] = $page->title . ' ['.$page->getBaseFileName().']';