diff --git a/main.c b/main.c
index 12e52d4..c131453 100644
--- a/main.c
+++ b/main.c
@@ -1,9 +1,8 @@
 /*
    SipHash reference C implementation
 
-   Written in 2012 by
-   Jean-Philippe Aumasson <jeanphilippe.aumasson@gmail.com>
-   Daniel J. Bernstein <djb@cr.yp.to>
+   Copyright (c) 2012 Jean-Philippe Aumasson <jeanphilippe.aumasson@gmail.com>
+   Copyright (c) 2012 Daniel J. Bernstein <djb@cr.yp.to>
 
    To the extent possible under law, the author(s) have dedicated all copyright
    and related and neighboring rights to this software to the public domain
diff --git a/siphash24.c b/siphash24.c
index 6ebe360..a260dcb 100644
--- a/siphash24.c
+++ b/siphash24.c
@@ -1,9 +1,8 @@
 /*
    SipHash reference C implementation
 
-   Written in 2012 by
-   Jean-Philippe Aumasson <jeanphilippe.aumasson@gmail.com>
-   Daniel J. Bernstein <djb@cr.yp.to>
+   Copyright (c) 2012 Jean-Philippe Aumasson <jeanphilippe.aumasson@gmail.com>
+   Copyright (c) 2012 Daniel J. Bernstein <djb@cr.yp.to>
 
    To the extent possible under law, the author(s) have dedicated all copyright
    and related and neighboring rights to this software to the public domain