diff --git a/rbf/dot.go b/rbf/dot.go
index 6914b7aaf..3ad2f9d57 100644
--- a/rbf/dot.go
+++ b/rbf/dot.go
@@ -1,4 +1,16 @@
-// Package rbf implements the roaring b-tree file format.
+// Copyright 2017 Pilosa Corp.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
 package rbf
 
 import (