diff --git a/components/script/dom/webidls/XRRay.webidl b/components/script/dom/webidls/XRRay.webidl
index 317f6609c08..b67d8a511a5 100644
--- a/components/script/dom/webidls/XRRay.webidl
+++ b/components/script/dom/webidls/XRRay.webidl
@@ -7,7 +7,7 @@
 [SecureContext, Exposed=Window, Pref="dom.webxr.enabled"]
 interface XRRay {
   constructor(optional DOMPointInit origin = {}, optional DOMPointInit direction = {});
-  // constructor(XRRigidTransform transform);
+  constructor(XRRigidTransform transform);
   [SameObject] readonly attribute DOMPointReadOnly origin;
   [SameObject] readonly attribute DOMPointReadOnly direction;
   // [SameObject] readonly attribute Float32Array matrix;
diff --git a/components/script/dom/xrray.rs b/components/script/dom/xrray.rs
index 2cf7b2b3a30..df53ab4ecc9 100644
--- a/components/script/dom/xrray.rs
+++ b/components/script/dom/xrray.rs
@@ -9,6 +9,7 @@ use crate::dom::bindings::root::DomRoot;
 use crate::dom::dompointreadonly::DOMPointReadOnly;
 use crate::dom::globalscope::GlobalScope;
 use crate::dom::window::Window;
+use crate::dom::xrrigidtransform::XRRigidTransform;
 use dom_struct::dom_struct;
 use euclid::Vector3D;
 use webxr_api::{ApiSpace, Ray};
@@ -45,6 +46,18 @@ impl XRRay {
 
         Self::new(&window.global(), Ray { origin, direction })
     }
+
+    #[allow(non_snake_case)]
+    /// https://immersive-web.github.io/hit-test/#dom-xrray-xrray-transform
+    pub fn Constructor_(window: &Window, transform: &XRRigidTransform) -> DomRoot<Self> {
+        let transform = transform.transform();
+        let origin = transform.translation;
+        let direction = transform
+            .rotation
+            .transform_vector3d(Vector3D::new(0., 0., -1.));
+
+        Self::new(&window.global(), Ray { origin, direction })
+    }
 }
 
 impl XRRayMethods for XRRay {
diff --git a/components/script/dom/xrsession.rs b/components/script/dom/xrsession.rs
index dc2b5b3c497..093c15e8dd6 100644
--- a/components/script/dom/xrsession.rs
+++ b/components/script/dom/xrsession.rs
@@ -47,8 +47,8 @@ use std::f64::consts::{FRAC_PI_2, PI};
 use std::mem;
 use std::rc::Rc;
 use webxr_api::{
-    self, util, Display, EnvironmentBlendMode, Event as XREvent, Frame, SelectEvent, SelectKind,
-    Session, SessionId, View, Viewer, Visibility,
+    self, util, ApiSpace, Display, EnvironmentBlendMode, Event as XREvent, Frame, SelectEvent,
+    SelectKind, Session, SessionId, View, Viewer, Visibility,
 };
 
 #[dom_struct]
@@ -711,8 +711,6 @@ impl XRSessionMethods for XRSession {
     }
 }
 
-#[derive(Clone, Copy, Debug)]
-pub struct ApiSpace;
 // The pose of an object in native-space. Should never be exposed.
 pub type ApiPose = RigidTransform3D<f32, ApiSpace, webxr_api::Native>;
 // The pose of the viewer in some api-space.