diff --git a/bloom/filter_test.go b/bloom/filter_test.go
index c81c4bb..518012e 100644
--- a/bloom/filter_test.go
+++ b/bloom/filter_test.go
@@ -1,3 +1,7 @@
+// Copyright (c) 2013, 2014 Conformal Systems LLC.
+// Use of this source code is governed by an ISC
+// license that can be found in the LICENSE file.
+
 package bloom_test
 
 import (
diff --git a/bloom/merkleblock.go b/bloom/merkleblock.go
index b8b17c2..6214ac5 100644
--- a/bloom/merkleblock.go
+++ b/bloom/merkleblock.go
@@ -1,3 +1,7 @@
+// Copyright (c) 2013, 2014 Conformal Systems LLC.
+// Use of this source code is governed by an ISC
+// license that can be found in the LICENSE file.
+
 package bloom
 
 import (
diff --git a/bloom/merkleblock_test.go b/bloom/merkleblock_test.go
index 37ef91a..fbb529e 100644
--- a/bloom/merkleblock_test.go
+++ b/bloom/merkleblock_test.go
@@ -1,3 +1,7 @@
+// Copyright (c) 2013, 2014 Conformal Systems LLC.
+// Use of this source code is governed by an ISC
+// license that can be found in the LICENSE file.
+
 package bloom_test
 
 import (
diff --git a/bloom/murmurhash3.go b/bloom/murmurhash3.go
index 9ff8986..9274dbc 100644
--- a/bloom/murmurhash3.go
+++ b/bloom/murmurhash3.go
@@ -1,3 +1,7 @@
+// Copyright (c) 2013, 2014 Conformal Systems LLC.
+// Use of this source code is governed by an ISC
+// license that can be found in the LICENSE file.
+
 package bloom
 
 import (
diff --git a/bloom/murmurhash3_test.go b/bloom/murmurhash3_test.go
index 1fc1d1f..fd0eaf0 100644
--- a/bloom/murmurhash3_test.go
+++ b/bloom/murmurhash3_test.go
@@ -1,3 +1,7 @@
+// Copyright (c) 2013, 2014 Conformal Systems LLC.
+// Use of this source code is governed by an ISC
+// license that can be found in the LICENSE file.
+
 package bloom_test
 
 import (