diff --git a/docs/API/hooks.mdx b/docs/API/hooks.mdx
index 821663af26..03cd152eb0 100644
--- a/docs/API/hooks.mdx
+++ b/docs/API/hooks.mdx
@@ -65,7 +65,7 @@ The hook is reactive, if you resize the browser for instance, you get fresh meas
 | `frameloop`       | Render mode: always, demand, never                                            | `always`, `demand`, `never`                                                                                                                                                                                    |
 | `performance`     | System regression                                                             | `{ current: number, min: number, max: number, debounce: number, regress: () => void }`                                                                                                                         |
 | `size`            | Canvas size in pixels                                                         | `{ width: number, height: number, top: number, left: number }`                                                                                                                                                 |
-| `viewport`        | Viewport size in three.js units                                               | `{ width: number, height: number, initialDpr: number, dpr: number, factor: number, distance: number, aspect: number, getCurrentViewport: (camera?: Camera, target?: THREE.Vector3, size?: Size) => Viewport }` |
+| `viewport`        | Canvas viewport size in three.js units. Note: This is different from [`gl.getViewport`](https://threejs.org/docs/#api/en/renderers/WebGLRenderer.getViewport) which returns the drawbuffer size                                               | `{ width: number, height: number, initialDpr: number, dpr: number, factor: number, distance: number, aspect: number, getCurrentViewport: (camera?: Camera, target?: THREE.Vector3, size?: Size) => Viewport }` |
 | `xr`              | XR interface, manages WebXR rendering                                         | `{ connect: () => void, disconnect: () => void }`                                                                                                                                                              |
 | `set`             | Allows you to set any state property                                          | `(state: SetState<RootState>) => void`                                                                                                                                                                         |
 | `get`             | Allows you to retrieve any state property non-reactively                      | `() => GetState<RootState>`                                                                                                                                                                                    |