diff --git a/types/three/three-core.d.ts b/types/three/three-core.d.ts
index 2ec61c82cd..d08d7ad1db 100644
--- a/types/three/three-core.d.ts
+++ b/types/three/three-core.d.ts
@@ -6586,13 +6586,13 @@ export class Curve<T extends Vector> {
      * Returns a vector for point t of the curve where t is between 0 and 1
      * getPoint(t: number): T;
      */
-    getPoint(t: number): T;
+    getPoint(t: number, optionalTarget?: T): T;
 
     /**
      * Returns a vector for point at relative position in curve according to arc length
      * getPointAt(u: number): T;
      */
-    getPointAt(u: number): T;
+    getPointAt(u: number, optionalTarget?: T): T;
 
     /**
      * Get sequence of points using getPoint( t )