diff --git a/changelog.txt b/changelog.txt
index 0fe3e44..51dd4d5 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -1,8 +1,9 @@
 Change log for Vector class library
 -----------------------------------
 
-2020-06-08 version 2.01.03
+2020-11-04 version 2.01.03
   * fix overflow in sin, cos, tan for large x
+  * Fix bug in is_nan for instruction sets prior to AVX
   * warning for MS compiler versions with poor support for AVX512
 
 2020-04-11 version 2.01.02