diff --git a/drivers/mailbox/rockchip-mbox-demo.c b/drivers/mailbox/rockchip-mbox-demo.c
index 17a313b7e0ab..b91c55e1ac87 100644
--- a/drivers/mailbox/rockchip-mbox-demo.c
+++ b/drivers/mailbox/rockchip-mbox-demo.c
@@ -2,7 +2,7 @@
 /*
  * Rockchip MBOX Demo.
  *
- * Copyright (c) 2023 Rockchip Electronics Co. Ltd.
+ * Copyright (c) 2023 Rockchip Electronics Co., Ltd.
  * Author: Jiahang Zheng <jiahang.zheng@rock-chips.com>
  */