diff --git a/libraries/classes/ConfigStorage/Relation.php b/libraries/classes/ConfigStorage/Relation.php
index 38e21d6182..e55d787ed0 100644
--- a/libraries/classes/ConfigStorage/Relation.php
+++ b/libraries/classes/ConfigStorage/Relation.php
@@ -59,7 +59,8 @@ class Relation
     /** @var DatabaseInterface */
     public $dbi;
 
-    public function __construct(DatabaseInterface $dbi)
+    /** @param DatabaseInterface $dbi */
+    public function __construct($dbi)
     {
         $this->dbi = $dbi;
     }