diff --git a/packages/frontend-app-api/src/extensions/CoreRoutes.tsx b/packages/frontend-app-api/src/extensions/CoreRoutes.tsx
index 0d20abfb6b..5c79b56f43 100644
--- a/packages/frontend-app-api/src/extensions/CoreRoutes.tsx
+++ b/packages/frontend-app-api/src/extensions/CoreRoutes.tsx
@@ -28,7 +28,7 @@ export const CoreRoutes = createExtension({
   inputs: {
     routes: createExtensionInput({
       path: coreExtensionData.routePath,
-      ref: coreExtensionData.routeRef,
+      ref: coreExtensionData.routeRef.optional(),
       element: coreExtensionData.reactElement,
     }),
   },