diff --git a/Libraries/LibWeb/DOM/Document.h b/Libraries/LibWeb/DOM/Document.h
index c72ada75d2f..f3e5b1e95e7 100644
--- a/Libraries/LibWeb/DOM/Document.h
+++ b/Libraries/LibWeb/DOM/Document.h
@@ -319,6 +319,7 @@ public:
 
     QuirksMode mode() const { return m_quirks_mode; }
     bool in_quirks_mode() const { return m_quirks_mode == QuirksMode::Yes; }
+    bool in_limited_quirks_mode() const { return m_quirks_mode == QuirksMode::Limited; }
     void set_quirks_mode(QuirksMode mode) { m_quirks_mode = mode; }
 
     Type document_type() const { return m_type; }