diff --git a/typo3/sysext/core/Classes/Http/Uri.php b/typo3/sysext/core/Classes/Http/Uri.php
index b62d08ef8363..c84c854e049f 100644
--- a/typo3/sysext/core/Classes/Http/Uri.php
+++ b/typo3/sysext/core/Classes/Http/Uri.php
@@ -87,7 +87,7 @@ class Uri implements UriInterface
      * The query part of the URI without the ?
      * @var string
      */
-    protected $query;
+    protected $query = '';
 
     /**
      * The fragment part of the URI without the # before