diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c
index 822a5cd05566..613cb356b918 100644
--- a/drivers/tty/serdev/core.c
+++ b/drivers/tty/serdev/core.c
@@ -431,7 +431,7 @@ static void serdev_drv_remove(struct device *dev)
 	dev_pm_domain_detach(dev, true);
 }
 
-static struct bus_type serdev_bus_type = {
+static const struct bus_type serdev_bus_type = {
 	.name		= "serial",
 	.match		= serdev_device_match,
 	.probe		= serdev_drv_probe,