diff --git a/components/script/dom/window.rs b/components/script/dom/window.rs
index 8ca1e324511..b978d819dea 100644
--- a/components/script/dom/window.rs
+++ b/components/script/dom/window.rs
@@ -266,6 +266,9 @@ pub struct Window {
     #[ignore_malloc_size_of = "channels are hard"]
     webvr_chan: Option<IpcSender<WebVRMsg>>,
 
+    #[ignore_malloc_size_of = "defined in webxr"]
+    webxr_registry: webxr_api::Registry,
+
     /// A map for storing the previous permission state read results.
     permission_state_invocation_results: DomRefCell<HashMap<String, PermissionState>>,
 
@@ -436,6 +439,10 @@ impl Window {
         self.webvr_chan.clone()
     }
 
+    pub fn webxr_registry(&self) -> &webxr_api::Registry {
+        &self.webxr_registry
+    }
+
     fn new_paint_worklet(&self) -> DomRoot<Worklet> {
         debug!("Creating new paint worklet.");
         Worklet::new(self, WorkletGlobalScopeType::Paint)
@@ -2072,6 +2079,7 @@ impl Window {
         navigation_start_precise: u64,
         webgl_chan: Option<WebGLChan>,
         webvr_chan: Option<IpcSender<WebVRMsg>>,
+        webxr_registry: webxr_api::Registry,
         microtask_queue: Rc<MicrotaskQueue>,
         webrender_document: DocumentId,
         webrender_api_sender: RenderApiSender,
@@ -2149,6 +2157,7 @@ impl Window {
             test_runner: Default::default(),
             webgl_chan,
             webvr_chan,
+            webxr_registry,
             permission_state_invocation_results: Default::default(),
             pending_layout_images: Default::default(),
             unminified_js_dir: Default::default(),
diff --git a/components/script/script_thread.rs b/components/script/script_thread.rs
index e6d91a1bc2e..38ca94953d3 100644
--- a/components/script/script_thread.rs
+++ b/components/script/script_thread.rs
@@ -2975,6 +2975,7 @@ impl ScriptThread {
             incomplete.navigation_start_precise,
             self.webgl_chan.as_ref().map(|chan| chan.channel()),
             self.webvr_chan.clone(),
+            self.webxr_registry.clone(),
             self.microtask_queue.clone(),
             self.webrender_document,
             self.webrender_api_sender.clone(),