diff --git a/javascript/src/QfqForm.js b/javascript/src/QfqForm.js
index dbdd2a27b568056d4627828130f9bacdef6f4e20..3d094849c5f7c1c755f18273ce0e024f8d3fbbd3 100644
--- a/javascript/src/QfqForm.js
+++ b/javascript/src/QfqForm.js
@@ -395,6 +395,10 @@ var QfqNS = QfqNS || {};
         $inputFile.prop("disabled", false);
         $inputFile.removeClass('hidden');
 
+        if ($inputFile.data('required')=='yes') {
+            $inputFile.prop("required", true);
+        }
+
         $inputFile.val("");
 
         this.form.markChanged();