diff --git a/src/api/XRRigidTransform.js b/src/api/XRRigidTransform.js
index 7ff5dcf..2194ea5 100644
--- a/src/api/XRRigidTransform.js
+++ b/src/api/XRRigidTransform.js
@@ -16,6 +16,7 @@
 import * as mat4 from 'gl-matrix/src/gl-matrix/mat4';
 import * as vec3 from 'gl-matrix/src/gl-matrix/vec3';
 import * as quat from 'gl-matrix/src/gl-matrix/quat';
+import DOMPointReadOnly from '../lib/DOMPointReadOnly';
 
 export const PRIVATE = Symbol('@@webxr-polyfill/XRRigidTransform');
 
diff --git a/src/lib/DOMPointReadOnly.js b/src/lib/DOMPointReadOnly.js
index 9851761..a147d03 100644
--- a/src/lib/DOMPointReadOnly.js
+++ b/src/lib/DOMPointReadOnly.js
@@ -60,6 +60,8 @@ if (!domPointROExport) {
      * @return {number}
      */
     get w() { return this[PRIVATE].w }
+
+    static fromPoint(p) { return new DOMPointReadOnly(p.x, p.y, p.z, p.w); }
   }
 }