diff --git a/drivers/rtc/rtc-pcf85063.c b/drivers/rtc/rtc-pcf85063.c
index 1afa6d9fa9fb..3e7ea5244562 100644
--- a/drivers/rtc/rtc-pcf85063.c
+++ b/drivers/rtc/rtc-pcf85063.c
@@ -159,10 +159,10 @@ static int pcf85063_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
 	if (ret)
 		return ret;
 
-	alrm->time.tm_sec = bcd2bin(buf[0]);
-	alrm->time.tm_min = bcd2bin(buf[1]);
-	alrm->time.tm_hour = bcd2bin(buf[2]);
-	alrm->time.tm_mday = bcd2bin(buf[3]);
+	alrm->time.tm_sec = bcd2bin(buf[0] & 0x7f);
+	alrm->time.tm_min = bcd2bin(buf[1] & 0x7f);
+	alrm->time.tm_hour = bcd2bin(buf[2] & 0x3f);
+	alrm->time.tm_mday = bcd2bin(buf[3] & 0x3f);
 
 	ret = regmap_read(pcf85063->regmap, PCF85063_REG_CTRL2, &val);
 	if (ret)