diff --git a/drivers/media/i2c/sony-btf-mpx.c b/drivers/media/i2c/sony-btf-mpx.c
index bc73e8ff0471..38cbea98764c 100644
--- a/drivers/media/i2c/sony-btf-mpx.c
+++ b/drivers/media/i2c/sony-btf-mpx.c
@@ -311,7 +311,7 @@ static int sony_btf_mpx_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
 	return 0;
 }
 
-static int sony_btf_mpx_s_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
+static int sony_btf_mpx_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *vt)
 {
 	struct sony_btf_mpx *t = to_state(sd);