diff --git a/charset/charset.go b/charset/charset.go
index b8ae9f4a4..aa2c98030 100644
--- a/charset/charset.go
+++ b/charset/charset.go
@@ -4,7 +4,7 @@
 // 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
+//     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,