diff --git a/COPYRIGHT b/COPYRIGHT
index d46826c01f70b5159bd2ab19449de02f3d72919d..3571385ecffacbc6da05b33a28388800c72dd8fa 100644
--- a/COPYRIGHT
+++ b/COPYRIGHT
@@ -33,8 +33,10 @@ licensed under following terms: "Permission to use, copy, modify,
 and/or distribute this code for any purpose with or without fee is
 hereby granted. There is no warranty."
 
-The x86_64 port was written by Nicholas J. Kain. See individual files
-for their copyright status.
+The x86_64 port was written by Nicholas J. Kain. Several files (crt)
+were released into the public domain; others are licensed under the
+standard MIT license terms. See individual files for their copyright
+status.
 
 All files which have no copyright comments are original works
 Copyright © 2005-2012 Rich Felker, the main author of this library.
diff --git a/src/setjmp/x86_64/longjmp.s b/src/setjmp/x86_64/longjmp.s
index 444076f13c6e35ab036ae21b388f8107a9f6d847..e175a4b9606bba41eccc8972c22244e533718f0a 100644
--- a/src/setjmp/x86_64/longjmp.s
+++ b/src/setjmp/x86_64/longjmp.s
@@ -1,4 +1,4 @@
-/* Copyright 2011 Nicholas J. Kain, licensed GNU LGPL 2.1 or later */
+/* Copyright 2011-2012 Nicholas J. Kain, licensed under standard MIT license */
 .global _longjmp
 .global longjmp
 .type _longjmp,@function
diff --git a/src/setjmp/x86_64/setjmp.s b/src/setjmp/x86_64/setjmp.s
index 5b3173b9c53045b8129055cda7ed8c3b56e9f556..98f58b8d6551e391f426fc53c81678a03ac89074 100644
--- a/src/setjmp/x86_64/setjmp.s
+++ b/src/setjmp/x86_64/setjmp.s
@@ -1,4 +1,4 @@
-/* Copyright 2011 Nicholas J. Kain, licensed GNU LGPL 2.1 or later */
+/* Copyright 2011-2012 Nicholas J. Kain, licensed under standard MIT license */
 .global __setjmp
 .global _setjmp
 .global setjmp
diff --git a/src/signal/x86_64/sigsetjmp.s b/src/signal/x86_64/sigsetjmp.s
index e883ac449360c227fb9acb49388c268f3b956c2e..94d7148ddfee602424f590dd7bd7094430f66a85 100644
--- a/src/signal/x86_64/sigsetjmp.s
+++ b/src/signal/x86_64/sigsetjmp.s
@@ -1,4 +1,4 @@
-/* Copyright 2011 Nicholas J. Kain, licensed GNU LGPL 2.1 or later */
+/* Copyright 2011-2012 Nicholas J. Kain, licensed under standard MIT license */
 .global sigsetjmp
 .type sigsetjmp,@function
 sigsetjmp:
diff --git a/src/thread/x86_64/__set_thread_area.s b/src/thread/x86_64/__set_thread_area.s
index 99c5356a77dadc4b825d090eb82d6663c19d8484..cc538e52e23e6c3fefcf5eb6a3802a1e3729cdfe 100644
--- a/src/thread/x86_64/__set_thread_area.s
+++ b/src/thread/x86_64/__set_thread_area.s
@@ -1,4 +1,4 @@
-/* Copyright 2011 Nicholas J. Kain, licensed GNU LGPL 2.1 or later */
+/* Copyright 2011-2012 Nicholas J. Kain, licensed under standard MIT license */
 .text
 .global __set_thread_area
 .type __set_thread_area,@function
diff --git a/src/thread/x86_64/__unmapself.s b/src/thread/x86_64/__unmapself.s
index 99c1b7c168efde0dfae9745f31805ef95ab3028a..e2689e65052ce76b4639324c3bcf239f97c36eee 100644
--- a/src/thread/x86_64/__unmapself.s
+++ b/src/thread/x86_64/__unmapself.s
@@ -1,4 +1,4 @@
-/* Copyright 2011 Nicholas J. Kain, licensed GNU LGPL 2.1 or later */
+/* Copyright 2011-2012 Nicholas J. Kain, licensed under standard MIT license */
 .text
 .global __unmapself
 .type   __unmapself,@function