--- a/dom/vr/VRDisplayEvent.cpp
+++ b/dom/vr/VRDisplayEvent.cpp
@@ -59,16 +59,17 @@ VRDisplayEvent::Constructor(mozilla::dom
                             const VRDisplayEventInit& aEventInitDict)
 {
   RefPtr<VRDisplayEvent> e = new VRDisplayEvent(aOwner);
   bool trusted = e->Init(aOwner);
   e->InitEvent(aType, aEventInitDict.mBubbles, aEventInitDict.mCancelable);
   if (aEventInitDict.mReason.WasPassed()) {
     e->mReason = Some(aEventInitDict.mReason.Value());
   }
+  e->mDisplay = aEventInitDict.mDisplay;
   e->SetTrusted(trusted);
   e->SetComposed(aEventInitDict.mComposed);
   return e.forget();
 }
 
 already_AddRefed<VRDisplayEvent>
 VRDisplayEvent::Constructor(const GlobalObject& aGlobal, const nsAString& aType,
                             const VRDisplayEventInit& aEventInitDict,