diff --git a/drivers/rtc/rtc-efi.c b/drivers/rtc/rtc-efi.c
index 797aa0252ba9..c4c38431012e 100644
--- a/drivers/rtc/rtc-efi.c
+++ b/drivers/rtc/rtc-efi.c
@@ -35,7 +35,7 @@ static inline int
 compute_yday(efi_time_t *eft)
 {
 	/* efi_time_t.month is in the [1-12] so, we need -1 */
-	return rtc_year_days(eft->day - 1, eft->month - 1, eft->year);
+	return rtc_year_days(eft->day, eft->month - 1, eft->year);
 }
 /*
  * returns day of the week [0-6] 0=Sunday