diff --git a/fs/isofs/util.c b/fs/isofs/util.c
index 42f479da0b28..6f9a90e58a89 100644
--- a/fs/isofs/util.c
+++ b/fs/isofs/util.c
@@ -25,7 +25,7 @@ struct timespec64 iso_date(u8 *p, int flags)
 		year = (p[0] - '0') * 1000 +
 		       (p[1] - '0') * 100 +
 		       (p[2] - '0') * 10 +
-		       (p[3] - '0') - 1900;
+		       (p[3] - '0');
 		month = ((p[4] - '0') * 10 + (p[5] - '0'));
 		day = ((p[6] - '0') * 10 + (p[7] - '0'));
 		hour = ((p[8] - '0') * 10 + (p[9] - '0'));
@@ -34,7 +34,7 @@ struct timespec64 iso_date(u8 *p, int flags)
 		ts.tv_nsec = ((p[14] - '0') * 10 + (p[15] - '0')) * 10000000;
 		tz = p[16];
 	} else {
-		year = p[0];
+		year = p[0] + 1900;
 		month = p[1];
 		day = p[2];
 		hour = p[3];
@@ -45,10 +45,10 @@ struct timespec64 iso_date(u8 *p, int flags)
 		tz = flags & ISO_DATE_HIGH_SIERRA ? 0 : p[6];
 	}
 
-	if (year < 0) {
+	if (year < 1) {
 		ts.tv_sec = 0;
 	} else {
-		ts.tv_sec = mktime64(year+1900, month, day, hour, minute, second);
+		ts.tv_sec = mktime64(year, month, day, hour, minute, second);
 
 		/* sign extend */
 		if (tz & 0x80)