diff --git a/intern/sky/include/sky_model.h b/intern/sky/include/sky_model.h
index 40359f7b8ab..64cac693983 100644
--- a/intern/sky/include/sky_model.h
+++ b/intern/sky/include/sky_model.h
@@ -1,3 +1,7 @@
+/* SPDX-FileCopyrightText: 2020-2022 Blender Authors
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later */
+
 /** \file
  * \ingroup intern_sky_modal
  */