diff --git a/tdfiglet.c b/tdfiglet.c
index 8ca43b1..b050201 100644
--- a/tdfiglet.c
+++ b/tdfiglet.c
@@ -1,3 +1,17 @@
+/* Copyright (c) 2018 Trollforge. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Trollforge's name may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ */
+
 #include <ctype.h>
 #include <errno.h>
 #include <fcntl.h>