diff --git a/Libraries/LibWeb/HTML/Navigable.cpp b/Libraries/LibWeb/HTML/Navigable.cpp
index 966c4b804b3..d9cb76abe93 100644
--- a/Libraries/LibWeb/HTML/Navigable.cpp
+++ b/Libraries/LibWeb/HTML/Navigable.cpp
@@ -297,7 +297,7 @@ void Navigable::activate_history_entry(GC::Ptr<SessionHistoryEntry> entry)
 }
 
 // https://html.spec.whatwg.org/multipage/document-sequences.html#nav-document
-GC::Ptr<DOM::Document> Navigable::active_document()
+GC::Ptr<DOM::Document> Navigable::active_document() const
 {
     // A navigable's active document is its active session history entry's document.
     return m_active_session_history_entry->document();
@@ -2549,10 +2549,10 @@ static String visible_text_in_range(DOM::Range const& range)
 
 String Navigable::selected_text() const
 {
-    auto document = const_cast<Navigable*>(this)->active_document();
+    auto document = active_document();
     if (!document)
         return String {};
-    auto selection = const_cast<DOM::Document&>(*document).get_selection();
+    auto selection = document->get_selection();
     auto range = selection->range();
     if (!range)
         return String {};
diff --git a/Libraries/LibWeb/HTML/Navigable.h b/Libraries/LibWeb/HTML/Navigable.h
index 962c771c25b..1277a603dfa 100644
--- a/Libraries/LibWeb/HTML/Navigable.h
+++ b/Libraries/LibWeb/HTML/Navigable.h
@@ -93,7 +93,7 @@ public:
 
     void activate_history_entry(GC::Ptr<SessionHistoryEntry>);
 
-    GC::Ptr<DOM::Document> active_document();
+    GC::Ptr<DOM::Document> active_document() const;
     GC::Ptr<BrowsingContext> active_browsing_context();
     GC::Ptr<WindowProxy> active_window_proxy();
     GC::Ptr<Window> active_window();