diff --git a/src/ImageSharp/Formats/WebP/AlphaCompressionMethod.cs b/src/ImageSharp/Formats/WebP/AlphaCompressionMethod.cs
index 52e3e3b615..abbb7d775d 100644
--- a/src/ImageSharp/Formats/WebP/AlphaCompressionMethod.cs
+++ b/src/ImageSharp/Formats/WebP/AlphaCompressionMethod.cs
@@ -1,3 +1,6 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
 namespace SixLabors.ImageSharp.Formats.WebP
 {
     internal enum AlphaCompressionMethod