diff --git a/drivers/rtc/rtc-pcf8563.c b/drivers/rtc/rtc-pcf8563.c
index 229426dee1eaa0a6f16c2dcee0964482f823c0d5..fc564d359941b1dfb21eb8595a3f1c604f5a8f7b 100644
--- a/drivers/rtc/rtc-pcf8563.c
+++ b/drivers/rtc/rtc-pcf8563.c
@@ -358,13 +358,13 @@ static int pcf8563_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *tm)
 	struct i2c_client *client = to_i2c_client(dev);
 	unsigned char buf[4];
 	int err;
-	unsigned long alarm_time;
 
 	/* The alarm has no seconds, round up to nearest minute */
 	if (tm->time.tm_sec) {
-		rtc_tm_to_time(&tm->time, &alarm_time);
-		alarm_time += 60-tm->time.tm_sec;
-		rtc_time_to_tm(alarm_time, &tm->time);
+		time64_t alarm_time = rtc_tm_to_time64(&tm->time);
+
+		alarm_time += 60 - tm->time.tm_sec;
+		rtc_time64_to_tm(alarm_time, &tm->time);
 	}
 
 	dev_dbg(dev, "%s, min=%d hour=%d wday=%d mday=%d "