diff --git a/CHANGES.md b/CHANGES.md
index 2dc4839e0c31..e89e17a6d999 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -9,6 +9,7 @@
 - Fixes jitter artifacts on Intel Arc GPUs [#12879](https://github.com/CesiumGS/cesium/issues/12879)
 - Fixed label sizing for some fonts and characters [#9767](https://github.com/CesiumGS/cesium/issues/9767)
 - Fixed a type error when accessing the ellipsoid of a viewer [#13123](https://github.com/CesiumGS/cesium/pull/13123)
+- Fixed a bug where entities have not been clustered correctly [#13064](https://github.com/CesiumGS/cesium/pull/13064)
 
 ## 1.137 - 2026-01-05
 
diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index 7de84032cb04..6f8a345c6297 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -437,3 +437,4 @@ See [CONTRIBUTING.md](CONTRIBUTING.md) for details on how to contribute to Cesiu
 - [Marco Zhan](https://github.com/marcoYxz)
 - [Mikhail Porotkin](https://github.com/porotkin)
 - [Adam Beili](https://github.com/Beilinson)
+- [段寒松](https://github.com/Duan971231)
diff --git a/packages/engine/Source/DataSources/EntityCluster.js b/packages/engine/Source/DataSources/EntityCluster.js
index ff572aaa975e..7c885d8a937d 100644
--- a/packages/engine/Source/DataSources/EntityCluster.js
+++ b/packages/engine/Source/DataSources/EntityCluster.js
@@ -330,7 +330,7 @@ function createDeclutterCallback(entityCluster) {
     let collectionIndex;
 
     if (points.length > 0) {
-      const index = new KDBush(points.length, 64, Uint32Array);
+      const index = new KDBush(points.length, 64, Float64Array);
       for (let p = 0; p < points.length; ++p) {
         index.add(points[p].coord.x, points[p].coord.y);
       }