diff --git a/src/internal/slibtool_ar_impl.h b/src/internal/slibtool_ar_impl.h
index 1464ce5..c171d26 100644
--- a/src/internal/slibtool_ar_impl.h
+++ b/src/internal/slibtool_ar_impl.h
@@ -1,3 +1,9 @@
+/*******************************************************************/
+/*  slibtool: a skinny libtool implementation, written in C        */
+/*  Copyright (C) 2016--2024  SysDeer Technologies, LLC            */
+/*  Released under the Standard MIT License; see COPYING.SLIBTOOL. */
+/*******************************************************************/
+
 #ifndef SLIBTOOL_AR_IMPL_H
 #define SLIBTOOL_AR_IMPL_H