diff --git a/changelogs/8.9.asciidoc b/changelogs/8.9.asciidoc
index 75af82371be..cadac47bdcb 100644
--- a/changelogs/8.9.asciidoc
+++ b/changelogs/8.9.asciidoc
@@ -48,3 +48,4 @@ No significant changes.
 - apmpackage: Remove `timeseries.instance` in ingest pipeline for pre-8.6 compatibility {pull}10973[10973]
 - apmpackage: Use "dynamic: runtime" instead of strict mapping for internal, TBS, and aggregation indices {pull}10968[10968]
 - Corrected as of 5 July 2023 to align with the correct license text for Elastic License 2.0 {pull}11120[11120]
+- Tail-based sampling: Migrate to protobuf codec for storage efficiency and performance {pull}10994[10994]