1 files changed, 3 insertions, 0 deletions

diff --git a/bus.h b/bus.h
index 4be9527..baa65be 100644
--- a/bus.h
+++ b/bus.h
@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: Unlicense
+ */
+
 #pragma once
 
 #define ROM_START       (0)