diff --git a/dom/media/MediaManager.cpp b/dom/media/MediaManager.cpp
index c0a914a966a..7af74e55c71 100644
--- a/dom/media/MediaManager.cpp
+++ b/dom/media/MediaManager.cpp
@@ -1683,12 +1683,12 @@ MediaManager::GetUserMedia(nsPIDOMWindow* aWindow,
     if (!privileged) {
       // only allow privileged content to set the window id
       if (vc.mBrowserWindow.WasPassed()) {
-        vc.mBrowserWindow.Construct(-1);
+        vc.mBrowserWindow.Value() = -1;
       }
       if (vc.mAdvanced.WasPassed()) {
         for (MediaTrackConstraintSet& cs : vc.mAdvanced.Value()) {
           if (cs.mBrowserWindow.WasPassed()) {
-            cs.mBrowserWindow.Construct(-1);
+            cs.mBrowserWindow.Value() = -1;
           }
         }
       }