diff --git a/cmd/restic/cmd_unlock.go b/cmd/restic/cmd_unlock.go
index c06fc8614..48f2e593d 100644
--- a/cmd/restic/cmd_unlock.go
+++ b/cmd/restic/cmd_unlock.go
@@ -19,6 +19,8 @@ func newUnlockCommand(globalOptions *global.Options) *cobra.Command {
 		Long: `
 The "unlock" command removes stale locks that have been created by other restic processes.
 
+Removing locks works even with repositories served in append-only mode from restic's rest-server.
+
 EXIT STATUS
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