--- a/layout/base/nsLayoutUtils.cpp
+++ b/layout/base/nsLayoutUtils.cpp
@@ -3389,20 +3389,22 @@ nsLayoutUtils::ExpireDisplayPortOnAsyncS
       break;
     }
     nsIScrollableFrame* scrollAncestor = GetAsyncScrollableAncestorFrame(frame);
     if (!scrollAncestor) {
       break;
     }
     frame = do_QueryFrame(scrollAncestor);
     MOZ_ASSERT(frame);
+    if (!frame) {
+      break;
+    }
     MOZ_ASSERT(scrollAncestor->WantAsyncScroll() ||
       frame->PresContext()->PresShell()->GetRootScrollFrame() == frame);
-    if (nsLayoutUtils::AsyncPanZoomEnabled(frame) &&
-        nsLayoutUtils::HasDisplayPort(frame->GetContent())) {
+    if (nsLayoutUtils::HasDisplayPort(frame->GetContent())) {
       scrollAncestor->TriggerDisplayPortExpiration();
       // Stop after the first trigger. If it failed, there's no point in
       // continuing because all the rest of the frames we encounter are going
       // to be ancestors of |scrollAncestor| which will keep its displayport.
       // If the trigger succeeded, we stop because when the trigger executes
       // it will call this function again to trigger the next ancestor up the
       // chain.
       break;