diff --git a/ReleaseNotes.txt b/ReleaseNotes.txt
index 8010d0b21c0063c9eab3ecad8066240c55a438aa..3c17899e4d11e8515e719cf000df62a91491101e 100644
--- a/ReleaseNotes.txt
+++ b/ReleaseNotes.txt
@@ -19,6 +19,7 @@ Additions
         new struct Config
         new c-tor that takes a Config object as unique parameter. Previous c-tor
         are now deprecated.
+        new interface IMessageHandler
     -> see <nexuscpp/nxbuffer.h>
 
     class DatasetWriter