diff --git a/endlessh.c b/endlessh.c
index 1da163b..f2aae72 100644
--- a/endlessh.c
+++ b/endlessh.c
@@ -1,3 +1,7 @@
+/* Endlessh: an SSH tarpit
+ *
+ * This is free and unencumbered software released into the public domain.
+ */
 #if defined(__OpenBSD__)
 #  define _BSD_SOURCE  /* for pledge(2) and unveil(2) */
 #else