diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
index 04841386b65da4b474e8b30afe9872a727eac902..f171cce5197de6d6d84f523623e5de90ef20100c 100644
--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c
@@ -784,7 +784,7 @@ static void msdc_set_mclk(struct msdc_host *host, unsigned char timing, u32 hz)
 
 	if (timing == MMC_TIMING_MMC_HS400 &&
 	    host->dev_comp->hs400_tune)
-		sdr_set_field(host->base + PAD_CMD_TUNE,
+		sdr_set_field(host->base + tune_reg,
 			      MSDC_PAD_TUNE_CMDRRDLY,
 			      host->hs400_cmd_int_delay);
 	dev_dbg(host->dev, "sclk: %d, timing: %d\n", host->sclk, timing);