diff --git a/src/util/mod.rs b/src/util/mod.rs
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+++ b/src/util/mod.rs
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+// Copyright (c) 2019 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+/// Error type returned by every parser on failure.
+pub mod error;
+
+/// Various helpers.
+pub(crate) mod helpers;
+
+/// Helper macros to parse and serialise more easily.
+#[macro_use]
+mod macros;
+
+#[cfg(test)]
+/// Namespace-aware comparison for tests
+pub(crate) mod compare_elements;