diff --git a/src/symbols.rs b/src/symbols.rs
index 73270eb..f9734a3 100644
--- a/src/symbols.rs
+++ b/src/symbols.rs
@@ -1,3 +1,6 @@
+// Copyright (c) 2022 Marceline Cramer
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 use crate::parse;
 use std::collections::HashMap;