diff --git a/wal/block.go b/wal/block.go
index bc053bbbf..a08ac83a6 100644
--- a/wal/block.go
+++ b/wal/block.go
@@ -1,3 +1,19 @@
+/*
+Copyright 2014 CoreOS Inc.
+
+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 wal
 
 import (
diff --git a/wal/block_test.go b/wal/block_test.go
index 1bf73fc75..6d0d01350 100644
--- a/wal/block_test.go
+++ b/wal/block_test.go
@@ -1,3 +1,19 @@
+/*
+Copyright 2014 CoreOS Inc.
+
+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 wal
 
 import (
diff --git a/wal/wal.go b/wal/wal.go
index 467747945..6f0685df4 100644
--- a/wal/wal.go
+++ b/wal/wal.go
@@ -1,3 +1,19 @@
+/*
+Copyright 2014 CoreOS Inc.
+
+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 wal
 
 import (
diff --git a/wal/wal_test.go b/wal/wal_test.go
index f13762099..287190476 100644
--- a/wal/wal_test.go
+++ b/wal/wal_test.go
@@ -1,3 +1,19 @@
+/*
+Copyright 2014 CoreOS Inc.
+
+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 wal
 
 import (