X-Git-Url: http://source.bookstackapp.com/bookstack/blobdiff_plain/9bd5d6a4224afb95fe2a5e1827d587b82dc23b29..refs/pull/598/head:/app/Http/Controllers/BookController.php

diff --git a/app/Http/Controllers/BookController.php b/app/Http/Controllers/BookController.php
index 5342ece6b..7e4b3fd81 100644
--- a/app/Http/Controllers/BookController.php
+++ b/app/Http/Controllers/BookController.php
@@ -183,7 +183,7 @@ class BookController extends Controller
         $this->checkOwnablePermission('book-update', $book);
 
         // Return if no map sent
-        if (!$request->has('sort-tree')) {
+        if (!$request->filled('sort-tree')) {
             return redirect($book->getUrl());
         }