diff --git a/unmount.go b/unmount.go
index 0cc989d..a9d78e0 100644
--- a/unmount.go
+++ b/unmount.go
@@ -1,6 +1,21 @@
-package fuseshim
+// Copyright 2015 Google Inc. All Rights Reserved.
+//
+// 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.
 
-// Unmount tries to unmount the filesystem mounted at dir.
+package fuse
+
+// Attempt to unmount the file system whose mount point is the supplied
+// directory.
 func Unmount(dir string) error {
 	return unmount(dir)
 }