diff --git a/Classes/Domain/Model/MenuItemPage.php b/Classes/Domain/Model/MenuItemPage.php
index f64b1a78fff499d17d2c3d78dbad149829daf923..f3712eb36bc93ea9c9ab599463ef8da717404298 100644
--- a/Classes/Domain/Model/MenuItemPage.php
+++ b/Classes/Domain/Model/MenuItemPage.php
@@ -13,7 +13,7 @@ class MenuItemPage extends MenuItem
      */
     public function getTitle(): string
     {
-        return $this->title ?:
+        return (string) $this->title ?:
             ObjectAccess::getPropertyPath($this, 'page.navTitle') ?:
                 ObjectAccess::getPropertyPath($this, 'page.title');
     }
@@ -23,7 +23,7 @@ class MenuItemPage extends MenuItem
      */
     public function getSubtitle(): string
     {
-        return $this->subtitle ?:
+        return (string) $this->subtitle ?:
             ObjectAccess::getPropertyPath($this, 'page.subtitle');
     }
 }