diff --git a/Changes b/Changes
index 15be3293a..45b65927b 100644
--- a/Changes
+++ b/Changes
@@ -1,7 +1,8 @@
 LIST OF CHANGES
 ---------------
 
- - tweak to GbS library type check in seq_alignment.pm as arrived as GBS.
+release 51.12.1
+ - tweak to GbS library type check in seq_alignment.pm as arrived as GBS (now case-insensitive).
 
 release 51.12.0
  - Travis CI build - add iRODS test server