diff --git a/src/Editor/SelectControls.ts b/src/Editor/SelectControls.ts
index 5799bcaaf..2e938f846 100644
--- a/src/Editor/SelectControls.ts
+++ b/src/Editor/SelectControls.ts
@@ -73,7 +73,7 @@ export class SelectControls implements EditorService
         if (this.m_Viewer.m_OutlinePass.selectedObjects.length > 0)
         {
             let obj = this.m_Viewer.m_OutlinePass.selectedObjects[0];
-            let mat = obj.matrixWorld;
+            let mat = obj.matrixWorld.clone();
             let box = GetBox(obj);
             if (box.isEmpty()) return;
             mat.setPosition(box.getCenter(new Vector3()));