diff --git a/util/dropafter/dropafter.go b/util/dropafter/dropafter.go
index e9e9442f..0a6b5dae 100644
--- a/util/dropafter/dropafter.go
+++ b/util/dropafter/dropafter.go
@@ -1,7 +1,6 @@
-/*
-t f
- * Copyright (c) 2013 Conformal Systems LLC.
- */
+// Copyright (c) 2013 Conformal Systems LLC.
+// Use of this source code is governed by an ISC
+// license that can be found in the LICENSE file.
 
 package main
 
diff --git a/util/showblock/showblock.go b/util/showblock/showblock.go
index 419294df..3acc77b9 100644
--- a/util/showblock/showblock.go
+++ b/util/showblock/showblock.go
@@ -1,6 +1,6 @@
-/*
- * Copyright (c) 2013 Conformal Systems LLC.
- */
+// Copyright (c) 2013 Conformal Systems LLC.
+// Use of this source code is governed by an ISC
+// license that can be found in the LICENSE file.
 
 package main