diff --git a/drivers/mailbox/mtk-cmdq-mailbox.c b/drivers/mailbox/mtk-cmdq-mailbox.c
index 6f92c5ee12f70883a2bd50f870d9bdc6340c7d45..aec46d5d3506181a7dc34bee920d80645c2c95f0 100644
--- a/drivers/mailbox/mtk-cmdq-mailbox.c
+++ b/drivers/mailbox/mtk-cmdq-mailbox.c
@@ -567,3 +567,5 @@ static void __exit cmdq_drv_exit(void)
 
 subsys_initcall(cmdq_drv_init);
 module_exit(cmdq_drv_exit);
+
+MODULE_LICENSE("GPL v2");