diff --git a/Userland/Libraries/LibWeb/HTML/BrowsingContext.cpp b/Userland/Libraries/LibWeb/HTML/BrowsingContext.cpp
index 14cb47f463..1bf4ec8617 100644
--- a/Userland/Libraries/LibWeb/HTML/BrowsingContext.cpp
+++ b/Userland/Libraries/LibWeb/HTML/BrowsingContext.cpp
@@ -242,7 +242,6 @@ JS::NonnullGCPtr<BrowsingContext> BrowsingContext::create_a_new_browsing_context
     auto new_entry = browsing_context->heap().allocate_without_realm<SessionHistoryEntry>();
     new_entry->url = AK::URL("about:blank");
     new_entry->document = document.ptr();
-    new_entry->serialized_state = {};
     new_entry->policy_container = {};
     new_entry->scroll_restoration_mode = {};
     new_entry->browsing_context_name = {};
@@ -1244,7 +1243,6 @@ WebIDL::ExceptionOr<void> BrowsingContext::navigate_to_a_fragment(AK::URL const&
     auto new_entry = heap().allocate_without_realm<SessionHistoryEntry>();
     new_entry->url = url;
     new_entry->document = current_entry().document;
-    new_entry->serialized_state = {};
     new_entry->policy_container = current_entry().policy_container;
     new_entry->scroll_restoration_mode = current_entry().scroll_restoration_mode;
     new_entry->browsing_context_name = {};
diff --git a/Userland/Libraries/LibWeb/HTML/SessionHistoryEntry.h b/Userland/Libraries/LibWeb/HTML/SessionHistoryEntry.h
index d30b4df6e5..8ef65a8628 100644
--- a/Userland/Libraries/LibWeb/HTML/SessionHistoryEntry.h
+++ b/Userland/Libraries/LibWeb/HTML/SessionHistoryEntry.h
@@ -50,10 +50,6 @@ struct SessionHistoryEntry final : public JS::Cell {
     // https://html.spec.whatwg.org/multipage/browsing-the-web.html#she-document-state
     JS::GCPtr<HTML::DocumentState> document_state;
 
-    // https://html.spec.whatwg.org/multipage/browsing-the-web.html#she-serialized-state
-    // serialized state, which is serialized state, initially StructuredSerializeForStorage(null).
-    Optional<DeprecatedString> serialized_state;
-
     // https://html.spec.whatwg.org/multipage/browsing-the-web.html#she-scroll-restoration-mode
     // scroll restoration mode, a scroll restoration mode, initially "auto"
     ScrollRestorationMode scroll_restoration_mode { ScrollRestorationMode::Auto };