diff --git a/main.go b/main.go
index 7c25dfc..8b9e103 100644
--- a/main.go
+++ b/main.go
@@ -1,6 +1,7 @@
 // Copyright (c) 2019, The Garble Authors.
 // See LICENSE for licensing information.
 
+// garble obfuscates Go code by wrapping the Go toolchain.
 package main
 
 import (