diff --git a/LICENSE b/LICENSE
index 10472b0873d..08b56bf08f3 100644
--- a/LICENSE
+++ b/LICENSE
@@ -215,11 +215,21 @@ Rhombus Math Library
 ====================
 
 The math library used in NuttX derives from the Rhombus OS by Nick Johnson
-(with many, many addtions).  The Rhombus OS is/was distributed under the ISC
-license.  The ISC licsense is a permissive license that allows people do
-anything with your code with proper attribution and without warranty.  The
-ISC license is functionally equivalent to the BSD 2-Clause and MIT licenses,
-removing some language that is no longer necessary.
+(with many, many additions):
+
+  Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com>
+
+  Permission to use, copy, modify, and distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
 IGMP
 ====