diff --git a/readme.txt b/readme.txt
index 6a110ef26..f888d25f6 100644
--- a/readme.txt
+++ b/readme.txt
@@ -89,6 +89,8 @@
 *****************************************************************************
 
 *** 2.7.0 ***
+- FIX: Fixed simulated IO message is corrupted in simulator (bug #468)
+  (backported to 2.6.4).
 - FIX: Fixed TM32 SDC driver clock activation issue (bug #464)(backported to
   2.6.3).
 - FIX: Fixed can_lld.c referencing unknown type (bug #463).