diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi_ddc.c b/drivers/gpu/drm/mediatek/mtk_hdmi_ddc.c
index 6358e1af69b4..2acbdb025d89 100644
--- a/drivers/gpu/drm/mediatek/mtk_hdmi_ddc.c
+++ b/drivers/gpu/drm/mediatek/mtk_hdmi_ddc.c
@@ -328,7 +328,7 @@ static const struct of_device_id mtk_hdmi_ddc_match[] = {
 };
 MODULE_DEVICE_TABLE(of, mtk_hdmi_ddc_match);
 
-struct platform_driver mtk_hdmi_ddc_driver = {
+static struct platform_driver mtk_hdmi_ddc_driver = {
 	.probe = mtk_hdmi_ddc_probe,
 	.remove = mtk_hdmi_ddc_remove,
 	.driver = {