public domain header, include protection
diff --git a/libtelnet.c b/libtelnet.c
index f55b59a..badffaf 100644
--- a/libtelnet.c
+++ b/libtelnet.c
@@ -1,3 +1,11 @@
+/*
+ * The author or authors of this code dedicate any and all copyright interest
+ * in this code to the public domain. We make this dedication for the benefit
+ * of the public at large and to the detriment of our heirs and successors. We
+ * intend this dedication to be an overt act of relinquishment in perpetuity of
+ * all present and future rights to this code under copyright law.
+ */
+
#include "libtelnet.h"
/* initialize a telnet state tracker */