diff --git a/cmd/restic/cmd_backup.go b/cmd/restic/cmd_backup.go
index 2ef123fbe..a53c08cfb 100644
--- a/cmd/restic/cmd_backup.go
+++ b/cmd/restic/cmd_backup.go
@@ -133,8 +133,8 @@ func (opts *BackupOptions) AddFlags(f *pflag.FlagSet) {
 	f.StringArrayVar(&opts.FilesFromRaw, "files-from-raw", nil, "read the files to backup from `file` (can be combined with file args; can be specified multiple times)")
 	f.StringVar(&opts.TimeStamp, "time", "", "`time` of the backup (ex. '2012-11-01 22:08:41') (default: now)")
 	f.BoolVar(&opts.WithAtime, "with-atime", false, "store the atime for all files and directories")
-	f.BoolVar(&opts.IgnoreInode, "ignore-inode", false, "ignore inode number and ctime changes when checking for modified files")
-	f.BoolVar(&opts.IgnoreCtime, "ignore-ctime", false, "ignore ctime changes when checking for modified files")
+	f.BoolVar(&opts.IgnoreInode, "ignore-inode", false, "ignore inode number and ctime changes when checking for modified files (default: $RESTIC_IGNORE_INODE or false)")
+	f.BoolVar(&opts.IgnoreCtime, "ignore-ctime", false, "ignore ctime changes when checking for modified files (default: $RESTIC_IGNORE_CTIME or false)")
 	f.BoolVarP(&opts.DryRun, "dry-run", "n", false, "do not upload or write any data, just show what would be done")
 	f.BoolVar(&opts.NoScan, "no-scan", false, "do not run scanner to estimate size of backup")
 	if runtime.GOOS == "windows" {