diff --git a/components/script/dom/dompointreadonly.rs b/components/script/dom/dompointreadonly.rs
index 2387cb8f6d5..e8ae7aa4990 100644
--- a/components/script/dom/dompointreadonly.rs
+++ b/components/script/dom/dompointreadonly.rs
@@ -2,6 +2,7 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
+use crate::dom::bindings::codegen::Bindings::DOMPointBinding::DOMPointInit;
 use crate::dom::bindings::codegen::Bindings::DOMPointReadOnlyBinding::{
     DOMPointReadOnlyMethods, Wrap,
 };
@@ -50,6 +51,10 @@ impl DOMPointReadOnly {
     ) -> Fallible<DomRoot<DOMPointReadOnly>> {
         Ok(DOMPointReadOnly::new(global, x, y, z, w))
     }
+
+    pub fn new_from_init(global: &GlobalScope, p: &DOMPointInit) -> DomRoot<DOMPointReadOnly> {
+        DOMPointReadOnly::new(global, p.x, p.y, p.z, p.w)
+    }
 }
 
 impl DOMPointReadOnlyMethods for DOMPointReadOnly {
diff --git a/components/script/dom/webidls/XRRigidTransform.webidl b/components/script/dom/webidls/XRRigidTransform.webidl
index f7ccd0fb188..aa2bc93fa31 100644
--- a/components/script/dom/webidls/XRRigidTransform.webidl
+++ b/components/script/dom/webidls/XRRigidTransform.webidl
@@ -4,8 +4,8 @@
 
 // https://immersive-web.github.io/webxr/#xrrigidtransform-interface
 
-[SecureContext, Exposed=Window, Pref="dom.webxr.enabled"]
-// [Constructor(optional DOMPointInit position, optional DOMPointInit orientation)]
+[SecureContext, Exposed=Window, Pref="dom.webxr.enabled",
+ Constructor(optional DOMPointInit position, optional DOMPointInit orientation)]
 interface XRRigidTransform {
   // readonly attribute DOMPointReadOnly position;
   // readonly attribute DOMPointReadOnly orientation;
diff --git a/components/script/dom/xrrigidtransform.rs b/components/script/dom/xrrigidtransform.rs
index b147e274810..d30a074fbf9 100644
--- a/components/script/dom/xrrigidtransform.rs
+++ b/components/script/dom/xrrigidtransform.rs
@@ -2,30 +2,57 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
+use crate::dom::bindings::codegen::Bindings::DOMPointBinding::DOMPointInit;
 use crate::dom::bindings::codegen::Bindings::XRRigidTransformBinding;
+use crate::dom::bindings::error::Fallible;
+use crate::dom::bindings::reflector::DomObject;
 use crate::dom::bindings::reflector::{reflect_dom_object, Reflector};
-use crate::dom::bindings::root::DomRoot;
-use crate::dom::globalscope::GlobalScope;
+use crate::dom::bindings::root::{Dom, DomRoot};
+use crate::dom::dompointreadonly::DOMPointReadOnly;
+use crate::dom::window::Window;
 use dom_struct::dom_struct;
 
 #[dom_struct]
 pub struct XRRigidTransform {
     reflector_: Reflector,
+    position: Dom<DOMPointReadOnly>,
+    orientation: Dom<DOMPointReadOnly>,
 }
 
 impl XRRigidTransform {
-    fn new_inherited() -> XRRigidTransform {
+    fn new_inherited(
+        position: &DOMPointReadOnly,
+        orientation: &DOMPointReadOnly,
+    ) -> XRRigidTransform {
         XRRigidTransform {
             reflector_: Reflector::new(),
+            position: Dom::from_ref(position),
+            orientation: Dom::from_ref(orientation),
         }
     }
 
     #[allow(unused)]
-    pub fn new(global: &GlobalScope) -> DomRoot<XRRigidTransform> {
+    pub fn new(
+        global: &Window,
+        position: &DOMPointReadOnly,
+        orientation: &DOMPointReadOnly,
+    ) -> DomRoot<XRRigidTransform> {
         reflect_dom_object(
-            Box::new(XRRigidTransform::new_inherited()),
+            Box::new(XRRigidTransform::new_inherited(position, orientation)),
             global,
             XRRigidTransformBinding::Wrap,
         )
     }
+
+    // https://immersive-web.github.io/webxr/#dom-xrrigidtransform-xrrigidtransform
+    pub fn Constructor(
+        window: &Window,
+        position: &DOMPointInit,
+        orientation: &DOMPointInit,
+    ) -> Fallible<DomRoot<Self>> {
+        let global = window.global();
+        let position = DOMPointReadOnly::new_from_init(&global, &position);
+        let orientation = DOMPointReadOnly::new_from_init(&global, &orientation);
+        Ok(XRRigidTransform::new(window, &position, &orientation))
+    }
 }