diff --git a/signature/authoridentity.go b/signature/authoridentity.go
index a7fa696..fb9014c 100644
--- a/signature/authoridentity.go
+++ b/signature/authoridentity.go
@@ -1,3 +1,19 @@
+// Copyright Axis Communications AB.
+//
+// For a full list of individual contributors, please see the commit history.
+//
+// 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 signature
 
 import (
diff --git a/signature/authoridentity_test.go b/signature/authoridentity_test.go
index 321bea6..0a1ce10 100644
--- a/signature/authoridentity_test.go
+++ b/signature/authoridentity_test.go
@@ -1,3 +1,19 @@
+// Copyright Axis Communications AB.
+//
+// For a full list of individual contributors, please see the commit history.
+//
+// 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 signature
 
 import (