diff --git a/src/cmds/restic/cmd_cat.go b/src/cmds/restic/cmd_cat.go
index 74f04200d..d9e723ae7 100644
--- a/src/cmds/restic/cmd_cat.go
+++ b/src/cmds/restic/cmd_cat.go
@@ -14,7 +14,7 @@ import (
 )
 
 var cmdCat = &cobra.Command{
-	Use:   "cat [flags] [pack|blob|snapshot|key|masterkey|config|lock] ID",
+	Use:   "cat [flags] [pack|blob|snapshot|index|key|masterkey|config|lock] ID",
 	Short: "print internal objects to stdout",
 	Long: `
 The "cat" command is used to print internal objects to stdout.