diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c
index 3c8dfa7..be85ea5 100644
--- a/drivers/rtc/rtc-s3c.c
+++ b/drivers/rtc/rtc-s3c.c
@@ -273,7 +273,8 @@ static int s3c_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
 		 1900 + tm->tm_year, tm->tm_mon + 1, tm->tm_mday,
 		 tm->tm_hour, tm->tm_min, tm->tm_sec);
 
-	alrm_en = readb(base + S3C2410_RTCALM) & S3C2410_RTCALM_ALMEN;
+	/* Disable entires that are not chosen by alrm */
+	alrm_en = S3C2410_RTCALM_ALMEN;
 	writeb(0x00, base + S3C2410_RTCALM);
 
 	if (tm->tm_sec < 60 && tm->tm_sec >= 0) {