diff --git a/types/three/examples/jsm/curves/NURBSCurve.d.ts b/types/three/examples/jsm/curves/NURBSCurve.d.ts
index c49b53048..9f26b9abf 100644
--- a/types/three/examples/jsm/curves/NURBSCurve.d.ts
+++ b/types/three/examples/jsm/curves/NURBSCurve.d.ts
@@ -1,4 +1,12 @@
-import { Curve, Vector2, Vector3, Vector4 } from "three";
+import { Curve, CurveJSON, Vector2, Vector3, Vector4 } from "three";
+
+export interface NURBSCurveJSON extends CurveJSON {
+    degree: number;
+    knots: number[];
+    controlPoints: number[][];
+    startKnot: number;
+    endKnot: number;
+}
 
 export class NURBSCurve extends Curve<Vector3> {
     degree: number;
@@ -14,4 +22,7 @@ export class NURBSCurve extends Curve<Vector3> {
         startKnot?: number,
         endKnot?: number,
     );
+
+    toJSON(): NURBSCurveJSON;
+    fromJSON(json: NURBSCurveJSON): this;
 }