diff --git a/pkg/util/groupids_cgo.go b/pkg/util/groupids_cgo.go
index f97af9536..1ff80006b 100644
--- a/pkg/util/groupids_cgo.go
+++ b/pkg/util/groupids_cgo.go
@@ -1,6 +1,22 @@
 // +build linux darwin
 // +build cgo
 
+/*
+Copyright 2020 Google LLC
+
+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 util
 
 import (
diff --git a/pkg/util/groupids_fallback.go b/pkg/util/groupids_fallback.go
index d38995e66..3c9868e03 100644
--- a/pkg/util/groupids_fallback.go
+++ b/pkg/util/groupids_fallback.go
@@ -1,6 +1,22 @@
 // +build linux darwin
 // +build !cgo
 
+/*
+Copyright 2020 Google LLC
+
+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 util
 
 import (
diff --git a/pkg/util/syscall_credentials.go b/pkg/util/syscall_credentials.go
index 4320650a1..f0a2a3406 100644
--- a/pkg/util/syscall_credentials.go
+++ b/pkg/util/syscall_credentials.go
@@ -1,3 +1,19 @@
+/*
+Copyright 2020 Google LLC
+
+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 util
 
 import (