diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c
index 4a0b875..fd08876 100644
--- a/drivers/rtc/rtc-s3c.c
+++ b/drivers/rtc/rtc-s3c.c
@@ -242,34 +242,34 @@ static int s3c_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm)
 	if (alm_en & S3C2410_RTCALM_SECEN)
 		alm_tm->tm_sec = bcd2bin(alm_tm->tm_sec);
 	else
-		alm_tm->tm_sec = 0xff;
+		alm_tm->tm_sec = -1;
 
 	if (alm_en & S3C2410_RTCALM_MINEN)
 		alm_tm->tm_min = bcd2bin(alm_tm->tm_min);
 	else
-		alm_tm->tm_min = 0xff;
+		alm_tm->tm_min = -1;
 
 	if (alm_en & S3C2410_RTCALM_HOUREN)
 		alm_tm->tm_hour = bcd2bin(alm_tm->tm_hour);
 	else
-		alm_tm->tm_hour = 0xff;
+		alm_tm->tm_hour = -1;
 
 	if (alm_en & S3C2410_RTCALM_DAYEN)
 		alm_tm->tm_mday = bcd2bin(alm_tm->tm_mday);
 	else
-		alm_tm->tm_mday = 0xff;
+		alm_tm->tm_mday = -1;
 
 	if (alm_en & S3C2410_RTCALM_MONEN) {
 		alm_tm->tm_mon = bcd2bin(alm_tm->tm_mon);
 		alm_tm->tm_mon -= 1;
 	} else {
-		alm_tm->tm_mon = 0xff;
+		alm_tm->tm_mon = -1;
 	}
 
 	if (alm_en & S3C2410_RTCALM_YEAREN)
 		alm_tm->tm_year = bcd2bin(alm_tm->tm_year);
 	else
-		alm_tm->tm_year = 0xffff;
+		alm_tm->tm_year = -1;
 
 	return 0;
 }