diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
index 416f723a2dbb3..8e3eeb96db63e 100644
--- a/drivers/cdrom/cdrom.c
+++ b/drivers/cdrom/cdrom.c
@@ -2372,7 +2372,7 @@ static int cdrom_ioctl_timed_media_change(struct cdrom_device_info *cdi,
 		return -EFAULT;
 
 	tmp_info.media_flags = 0;
-	if (tmp_info.last_media_change - cdi->last_media_change_ms < 0)
+	if (cdi->last_media_change_ms > tmp_info.last_media_change)
 		tmp_info.media_flags |= MEDIA_CHANGED_FLAG;
 
 	tmp_info.last_media_change = cdi->last_media_change_ms;