diff --git a/fstbt.s b/fstbt.s
index 1a38bdd..cf21f49 100644
--- a/fstbt.s
+++ b/fstbt.s
@@ -1,3 +1,4 @@
+;license:BSD-3-Clause
 ;fast boot-loader in one sector
 ;copyright (c) Peter Ferrie 2016
 ;thanks to 4am for inspiration and testing