diff --git a/clockgating-plugin/reg_clock_gating.cc b/clockgating-plugin/reg_clock_gating.cc
index 677ce5e..1663f95 100644
--- a/clockgating-plugin/reg_clock_gating.cc
+++ b/clockgating-plugin/reg_clock_gating.cc
@@ -1,20 +1,18 @@
-/*
- 	Copyright 2022 AUC Open Source Hardware Lab
-	
-	Licensed under the Apache License, Version 2.0 (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
-
-	Unless required by applicable law or agreed to in writing, software 
-	distributed under the License is distributed on an "AS IS" BASIS, 
-	WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
-	See the License for the specific language governing permissions and 
-	limitations under the License.
-
-    SPDX-License-Identifier: Apache-2.0
-*/
+// Copyright 2022 AUC Open Source Hardware Lab
+//
+// Licensed under the Apache License, Version 2.0 (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
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// SPDX-License-Identifier: Apache-2.0
 
 #include "kernel/yosys.h"