diff --git a/types/three/examples/jsm/math/Octree.d.ts b/types/three/examples/jsm/math/Octree.d.ts
index b733a045a..0d9e1359f 100644
--- a/types/three/examples/jsm/math/Octree.d.ts
+++ b/types/three/examples/jsm/math/Octree.d.ts
@@ -3,13 +3,13 @@ import { Triangle, Box3, Ray, Sphere, Object3D } from '../../../src/Three.js';
 import { Capsule } from './Capsule.js';
 
 export class Octree {
-    box: Box3;
+    box: Box3 | null | undefined;
     bounds: Box3;
 
     subTrees: Octree[];
     triangles: Triangle[];
 
-    constructor(box?: Box3);
+    constructor(box?: Box3 | null);
 
     addTriangle(triangle: Triangle): this;
     calcBox(): this;
diff --git a/types/three/examples/jsm/renderers/common/Renderer.d.ts b/types/three/examples/jsm/renderers/common/Renderer.d.ts
index b4e93840f..ca4a23472 100644
--- a/types/three/examples/jsm/renderers/common/Renderer.d.ts
+++ b/types/three/examples/jsm/renderers/common/Renderer.d.ts
@@ -26,7 +26,7 @@ export default class Renderer {
 
     info: Info;
 
-    constructor(backend: Backend, parameters?: { logarithmicDepthBuffer?: boolean });
+    constructor(backend: Backend, parameters?: { logarithmicDepthBuffer?: boolean | undefined });
 
     init(): Promise<void>;
 
diff --git a/types/three/examples/jsm/utils/SortUtils.d.ts b/types/three/examples/jsm/utils/SortUtils.d.ts
index 9aa2697c3..f8ceb81c2 100644
--- a/types/three/examples/jsm/utils/SortUtils.d.ts
+++ b/types/three/examples/jsm/utils/SortUtils.d.ts
@@ -1,7 +1,7 @@
 export interface RadixSortOptions<T> {
-    aux?: T[];
-    get?: (el: T) => number;
-    reversed?: boolean;
+    aux?: T[] | undefined;
+    get?: ((el: T) => number) | undefined;
+    reversed?: boolean | undefined;
 }
 
 export const radixSort: <T = number>(arr: T[], opt?: RadixSortOptions<T>) => void;