diff --git a/util/explicit_bzero.c b/util/explicit_bzero.c
index df00966..fa19ba6 100644
--- a/util/explicit_bzero.c
+++ b/util/explicit_bzero.c
@@ -1,3 +1,4 @@
+/* See LICENSE file for copyright and license details. */
 #include <string.h>
 #include "../util.h"