diff --git a/README/ReleaseNotes/v616/index.md b/README/ReleaseNotes/v616/index.md
index 5fee06d987f16914e827832ddfbe1c6d711df67c..fa55249ffb26b2247ee898321846e9d21b0ff525 100644
--- a/README/ReleaseNotes/v616/index.md
+++ b/README/ReleaseNotes/v616/index.md
@@ -37,7 +37,9 @@ The following people have contributed to this new version:
 
 
 ## TTree Libraries
-
+### RDataFrame
+  - Optimise the creation of the set of branches names of an input dataset,
+  doing the work once and caching it in the RInterface.
 
 ## Histogram Libraries