diff --git a/drivers/rtc/rtc-ds1511.c b/drivers/rtc/rtc-ds1511.c
index 6869d28d34cc9ea09e5b0d27760c6f44d02fa51b..8b087d9556bee8b837e16a16e6220de8fa381693 100644
--- a/drivers/rtc/rtc-ds1511.c
+++ b/drivers/rtc/rtc-ds1511.c
@@ -323,6 +323,7 @@ static int ds1511_rtc_probe(struct platform_device *pdev)
 
 	ds1511->rtc->ops = &ds1511_rtc_ops;
 	ds1511->rtc->range_max = RTC_TIMESTAMP_END_2099;
+	ds1511->rtc->alarm_offset_max = 28 * 24 * 60 * 60 - 1;
 
 	/*
 	 * if the platform has an interrupt in mind for this device,