1 files changed, 2 insertions, 0 deletions

diff --git a/xxd.ml b/xxd.ml
index 7d3ab16..5c3bad9 100644
--- a/xxd.ml
+++ b/xxd.ml
@@ -1,3 +1,5 @@
+(* SPDX-License-Identifier: LGPL-3.0-only *)
+
 let (!!) = Bytes.unsafe_of_string
 let (??) = Bytes.unsafe_to_string