1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c
index a3fb235fea0d..7431a795a624 100644
--- a/drivers/rtc/rtc-m41t80.c
+++ b/drivers/rtc/rtc-m41t80.c
@@ -393,7 +393,7 @@ static int m41t80_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
         alrm->time.tm_min  = bcd2bin(alarmvals[3] & 0x7f);
         alrm->time.tm_hour = bcd2bin(alarmvals[2] & 0x3f);
         alrm->time.tm_mday = bcd2bin(alarmvals[1] & 0x3f);
-        alrm->time.tm_mon  = bcd2bin(alarmvals[0] & 0x3f);
+        alrm->time.tm_mon  = bcd2bin(alarmvals[0] & 0x3f) - 1;
 
         alrm->enabled = !!(alarmvals[0] & M41T80_ALMON_AFE);
         alrm->pending = (flags & M41T80_FLAGS_AF) && alrm->enabled;