diff --git a/release_notes.txt b/release_notes.txt
index da5c3c48..5bd70db5 100644
--- a/release_notes.txt
+++ b/release_notes.txt
@@ -1,6 +1,7 @@
 4.31.2 (draft):
   - Fixed variable handling #1458, #1566
   - Fixed merged anchor reference problem #1482
+  - Fixed xml encoding of ProcInst #1563, improved XML comment handling
   - Allow build without json and xml support (#1556) Thanks @afbjorklund
   - Bumped dependencies