diff --git a/CHANGES.md b/CHANGES.md
index 88578d6c841..97b11c7e6e0 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,13 @@
 # Change Log
 
+## 1.138 - 2026-02-02
+
+### @cesium/engine
+
+#### Fixes :wrench:
+
+- Fixed depth picking (`Scene.pickPosition`) with Gaussian splat 3D tilesets. [#12712](https://github.com/CesiumGS/cesium/issues/12712)
+
 ## 1.137 - 2026-01-05
 
 ### @cesium/engine
diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index 7de84032cb0..6d53ef05641 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)
+- [yuqingyang0129](https://github.com/yuqingyang0129)
diff --git a/packages/engine/Source/Scene/GaussianSplatPrimitive.js b/packages/engine/Source/Scene/GaussianSplatPrimitive.js
index bf8a74d8237..39fa428c164 100644
--- a/packages/engine/Source/Scene/GaussianSplatPrimitive.js
+++ b/packages/engine/Source/Scene/GaussianSplatPrimitive.js
@@ -617,7 +617,7 @@ GaussianSplatPrimitive.buildGSplatDrawCommand = function (
   const { shaderBuilder } = renderResources;
   const renderStateOptions = renderResources.renderStateOptions;
   renderStateOptions.cull.enabled = false;
-  renderStateOptions.depthMask = false;
+  renderStateOptions.depthMask = true;
   renderStateOptions.depthTest.enabled = true;
   renderStateOptions.blending = BlendingState.PRE_MULTIPLIED_ALPHA_BLEND;
   renderResources.alphaOptions.pass = Pass.GAUSSIAN_SPLATS;