diff --git a/src/lib/common/btu.c b/src/lib/common/btu.c
index ce9661f2..d1dd959a 100644
--- a/src/lib/common/btu.c
+++ b/src/lib/common/btu.c
@@ -4,21 +4,21 @@
  *                Ken Stevens, Steve McClure, Markus Armbruster
  *
  *  Empire is free software: you can redistribute it and/or modify
- *  it under the terms of the @GNU General Public License as published by
+ *  it under the terms of the GNU 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 General Public License for more details.
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
  *
- *  You should have received a copy of the @GNU General Public License
+ *  You should have received a copy of the GNU General Public License
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  *  ---
  *
- *  See files @README, @COPYING and @CREDITS in the root of the source
+ *  See files README, COPYING and CREDITS in the root of the source
  *  tree for related information and legal notices.  It is expected
  *  that future projects/authors will amend these files as needed.
  *