diff --git a/drivers/rtc/rtc-m48t86.c b/drivers/rtc/rtc-m48t86.c
index 7c045cf..f981287 100644
--- a/drivers/rtc/rtc-m48t86.c
+++ b/drivers/rtc/rtc-m48t86.c
@@ -77,7 +77,7 @@ static int m48t86_rtc_read_time(struct device *dev, struct rtc_time *tm)
 		if (ops->readbyte(M48T86_REG_HOUR) & 0x80)
 			tm->tm_hour += 12;

-	return 0;
+	return rtc_valid_tm(tm);
 }

 static int m48t86_rtc_set_time(struct device *dev, struct rtc_time *tm)