diff --git a/components/script/dom/webidls/XRView.webidl b/components/script/dom/webidls/XRView.webidl
index ceea69aaa89d..7f433425a8b5 100644
--- a/components/script/dom/webidls/XRView.webidl
+++ b/components/script/dom/webidls/XRView.webidl
@@ -7,7 +7,7 @@
 enum XREye {
   "left",
   "right",
-  "unknown",
+  "none",
 };
 
 [SecureContext, Exposed=Window, Pref="dom.webxr.enabled"]
diff --git a/components/script/dom/xrviewerpose.rs b/components/script/dom/xrviewerpose.rs
index 609d89765c69..ca47b2de3903 100644
--- a/components/script/dom/xrviewerpose.rs
+++ b/components/script/dom/xrviewerpose.rs
@@ -42,7 +42,7 @@ impl XRViewerPose {
         rooted_vec!(let mut views);
         session.with_session(|s| match s.views() {
             Views::Mono(view) => {
-                views.push(XRView::new(global, session, &view, XREye::Unknown, &pose))
+                views.push(XRView::new(global, session, &view, XREye::None, &pose))
             },
             Views::Stereo(left, right) => {
                 views.push(XRView::new(global, session, &left, XREye::Left, &pose));