diff --git a/Libraries/LibWeb/CSS/StyleDeclaration.h b/Libraries/LibWeb/CSS/StyleDeclaration.h
index 966bb4c0a5..79fc8479ea 100644
--- a/Libraries/LibWeb/CSS/StyleDeclaration.h
+++ b/Libraries/LibWeb/CSS/StyleDeclaration.h
@@ -49,7 +49,7 @@ public:
 
     const Vector<StyleProperty>& properties() const { return m_properties; }
 
-public:
+private:
     explicit StyleDeclaration(Vector<StyleProperty>&&);
 
     Vector<StyleProperty> m_properties;