diff --git a/board/dfi/dfi-bt700/dsdt.asl b/board/dfi/dfi-bt700/dsdt.asl
index 6042011..d2297ef 100644
--- a/board/dfi/dfi-bt700/dsdt.asl
+++ b/board/dfi/dfi-bt700/dsdt.asl
@@ -1,7 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 DefinitionBlock("dsdt.aml", "DSDT", 2, "U-BOOT", "U-BOOTBL", 0x00010000)