diff --git a/include/dj64/thunks_p.h b/include/dj64/thunks_p.h
index 8f1f0803..6e987f82 100644
--- a/include/dj64/thunks_p.h
+++ b/include/dj64/thunks_p.h
@@ -1,3 +1,21 @@
+/*
+ *  dj64 - 64bit djgpp-compatible tool-chain
+ *  Copyright (C) 2021-2024  @stsp
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License as published
+ *  by the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #include <stddef.h>
 #include <stdint.h>
 #include "util.h"