diff --git a/arch/arm/dts/rk3399-puma.dts b/arch/arm/dts/rk3399-puma.dts
index 71eb72d292..50e43c7740 100644
--- a/arch/arm/dts/rk3399-puma.dts
+++ b/arch/arm/dts/rk3399-puma.dts
@@ -1,7 +1,7 @@
 /*
  * (C) Copyright 2017 Theobroma Systems Design und Consulting GmbH
  *
- * SPDX-License-Identifier:     GPL-2.0+
+ * SPDX-License-Identifier:     GPL-2.0+	X11
  */
 
 /dts-v1/;