diff --git a/drivers/phy/mediatek/phy-mtk-mipi-dsi.c b/drivers/phy/mediatek/phy-mtk-mipi-dsi.c
index 18c481251f04..eeb357bfb0bb 100644
--- a/drivers/phy/mediatek/phy-mtk-mipi-dsi.c
+++ b/drivers/phy/mediatek/phy-mtk-mipi-dsi.c
@@ -234,7 +234,7 @@ static const struct of_device_id mtk_mipi_tx_match[] = {
 	{ },
 };
 
-struct platform_driver mtk_mipi_tx_driver = {
+static struct platform_driver mtk_mipi_tx_driver = {
 	.probe = mtk_mipi_tx_probe,
 	.remove = mtk_mipi_tx_remove,
 	.driver = {