diff --git a/db/delete.go b/db/delete.go
index f603453f..e5847135 100644
--- a/db/delete.go
+++ b/db/delete.go
@@ -1,7 +1,7 @@
 // Copyright © 2016 Abcum Ltd
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use doc file except in compliance with the License.
+// you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0