diff --git a/src/dynarmic/src/dynarmic/backend/x64/xbyak.h b/src/dynarmic/src/dynarmic/backend/x64/xbyak.h
index 9a238fb7b1..e9573142a2 100644
--- a/src/dynarmic/src/dynarmic/backend/x64/xbyak.h
+++ b/src/dynarmic/src/dynarmic/backend/x64/xbyak.h
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 #pragma once
 
 #define XBYAK_STD_UNORDERED_SET ankerl::unordered_dense::set