diff --git a/AUTHORS b/AUTHORS
index 28826af..312e8f1 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -3,12 +3,8 @@ Kamila Szewczyk <kspalaiologos@gmail.com, kszewczyk@acm.org>
 
 Acknowledgements:
 - Marshall Lochbaum (improved syndrome calculation).
-- Peter Cawley (developed the mixed-PCMULQDQ and SSE4.2 CRC32C
-  acceleration technique used by xpar). The code in xpar is
-  based on the fast-crc32 project of Peter's, available under
-  the MIT license.
 - Phil Karn (KA9Q) originally implemented the error+erasure
-  correction codec used by xpar.
+  correction codec used by xpar (GPLv2).
 
 Also contains verbatim code written by:
 - Rich Felker (getopt_long shim, Expat/MIT license).
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