diff --git a/pdf/fjson/fielddata_test.go b/pdf/fjson/fielddata_test.go
index 19973a82..e00ca51b 100644
--- a/pdf/fjson/fielddata_test.go
+++ b/pdf/fjson/fielddata_test.go
@@ -1,3 +1,8 @@
+/*
+ * This file is subject to the terms and conditions defined in
+ * file 'LICENSE.md', which is part of this source code package.
+ */
+
 package fjson
 
 import (