diff --git a/lucene/CHANGES.txt b/lucene/CHANGES.txt
index 5d0033eefe5..99e4e19fbc6 100644
--- a/lucene/CHANGES.txt
+++ b/lucene/CHANGES.txt
@@ -161,6 +161,9 @@ Optimizations
 * LUCENE-10502: Use IndexedDISI to store docIds and DirectMonotonicWriter/Reader to handle
   ordToDoc in HNSW vectors (Lu Xugang)
 
+* LUCENE-10488: Facets#getTopDims optimized for taxonomy faceting and
+  ConcurrentSortedSetDocValuesFacetCounts. (Yuting Gan)
+
 Bug Fixes
 ---------------------
 * LUCENE-10477: Highlighter: WeightedSpanTermExtractor.extractWeightedSpanTerms to Query#rewrite