--- a/dom/webidl/VRDisplayEvent.webidl
+++ b/dom/webidl/VRDisplayEvent.webidl
@@ -11,13 +11,14 @@ enum VRDisplayEventReason {
 };
 
 dictionary VRDisplayEventInit : EventInit {
   required VRDisplay display;
   VRDisplayEventReason reason;
 };
 
 [Pref="dom.vr.enabled",
+ SecureContext,
  Constructor(DOMString type, VRDisplayEventInit eventInitDict)]
 interface VRDisplayEvent : Event {
   readonly attribute VRDisplay display;
   readonly attribute VRDisplayEventReason? reason;
 };