diff --git a/sound/soc/rockchip/rockchip_pdm.c b/sound/soc/rockchip/rockchip_pdm.c
index c5ddeed97260f52e4aa2f994358d42a856696ed4..400e29edb1c9c4db4d3afbbad2b6a41952100a22 100644
--- a/sound/soc/rockchip/rockchip_pdm.c
+++ b/sound/soc/rockchip/rockchip_pdm.c
@@ -249,7 +249,7 @@ static int rockchip_pdm_dai_probe(struct snd_soc_dai *dai)
 	return 0;
 }
 
-static struct snd_soc_dai_ops rockchip_pdm_dai_ops = {
+static const struct snd_soc_dai_ops rockchip_pdm_dai_ops = {
 	.set_fmt = rockchip_pdm_set_fmt,
 	.trigger = rockchip_pdm_trigger,
 	.hw_params = rockchip_pdm_hw_params,