diff --git a/lib/Db/Question.php b/lib/Db/Question.php
index 26549d0e72f449b0d9d71b5544dbb8c04b3e132a..1ee2ea4f34bcb574edc5b03c926c75246db4e9ee 100644
--- a/lib/Db/Question.php
+++ b/lib/Db/Question.php
@@ -53,7 +53,8 @@ class Question extends Entity {
 		'long',
 		'multiple',
 		'multiple_unique',
-		'dropdown'
+		'dropdown',
+		'file'
 	];
 
 	public function __construct() {