diff --git a/types/three/examples/jsm/controls/ArcballControls.d.ts b/types/three/examples/jsm/controls/ArcballControls.d.ts
index 3d026e12b..661a89a52 100644
--- a/types/three/examples/jsm/controls/ArcballControls.d.ts
+++ b/types/three/examples/jsm/controls/ArcballControls.d.ts
@@ -124,6 +124,11 @@ export class ArcballControls extends EventDispatcher {
      */
     radiusFactor: number;
 
+    /**
+     * @default 1
+     */
+    rotateSpeed: number;
+
     constructor(camera: Camera, domElement: HTMLElement, scene?: Scene | null);
 
     getRaycaster(): Raycaster;