diff --git a/widget/gtk/WakeLockListener.cpp b/widget/gtk/WakeLockListener.cpp
--- a/widget/gtk/WakeLockListener.cpp
+++ b/widget/gtk/WakeLockListener.cpp
@@ -662,16 +662,17 @@
     return false;
   }
 
   UninhibitWaylandIdle();
 
-  MozContainerSurfaceLock lock(focusedWindow->GetMozContainer());
-  struct wl_surface* waylandSurface = lock.GetSurface();
-  if (waylandSurface) {
-    mWaylandInhibitor = zwp_idle_inhibit_manager_v1_create_inhibitor(
-        waylandDisplay->GetIdleInhibitManager(), waylandSurface);
-    mState = Inhibited;
+  if (GdkWindow* window = focusedWindow->GetGdkWindow()) {
+    wl_surface* waylandSurface = gdk_wayland_window_get_wl_surface(window);
+    if (waylandSurface) {
+      mWaylandInhibitor = zwp_idle_inhibit_manager_v1_create_inhibitor(
+          waylandDisplay->GetIdleInhibitManager(), waylandSurface);
+      mState = Inhibited;
+    }
   }
 
   WAKE_LOCK_LOG("InhibitWaylandIdle() %s",
                 !!mWaylandInhibitor ? "succeeded" : "failed");
   return !!mWaylandInhibitor;