diff --git a/src/shared/atlas/Types.ts b/src/shared/atlas/Types.ts
index b69dfe0d..e8bb6b0a 100644
--- a/src/shared/atlas/Types.ts
+++ b/src/shared/atlas/Types.ts
@@ -1 +1,6 @@
+/**
+ * Copyright (c) 2017 The xterm.js authors. All rights reserved.
+ * @license MIT
+ */
+
 export const CHAR_ATLAS_CELL_SPACING = 1;