diff --git a/drivers/rtc/rtc-tswizard.c b/drivers/rtc/rtc-tswizard.c
index 20d5281a2ef2..61506ad32625 100644
--- a/drivers/rtc/rtc-tswizard.c
+++ b/drivers/rtc/rtc-tswizard.c
@@ -115,7 +115,7 @@ static int wizard_rtc_set_offset(struct device *dev, long offset)
 	if (offset >= 0)
 		ctrl_reg |= RTC_PPB_CTL_SIGN;
 
-	return regmap_update_bits(wiz->regmap, RTC_FLAGS,
+	return regmap_update_bits(wiz->regmap, RTC_PPB_CTL,
 				  RTC_PPB_CTL_SIGN | RTC_PPB_CTL_EN,
 				  ctrl_reg);
 }