diff --git a/Services/WindowServer/MenuItem.cpp b/Services/WindowServer/MenuItem.cpp
index eba593c136..385ea0929d 100644
--- a/Services/WindowServer/MenuItem.cpp
+++ b/Services/WindowServer/MenuItem.cpp
@@ -78,6 +78,13 @@ Menu* MenuItem::submenu()
     return m_menu.client()->find_menu_by_id(m_submenu_id);
 }
 
+const Menu* MenuItem::submenu() const
+{
+    ASSERT(is_submenu());
+    ASSERT(m_menu.client());
+    return m_menu.client()->find_menu_by_id(m_submenu_id);
+}
+
 Gfx::Rect MenuItem::rect() const
 {
     if (!m_menu.is_scrollable())
diff --git a/Services/WindowServer/MenuItem.h b/Services/WindowServer/MenuItem.h
index 3f297adb43..e67b399319 100644
--- a/Services/WindowServer/MenuItem.h
+++ b/Services/WindowServer/MenuItem.h
@@ -77,6 +77,7 @@ public:
     void set_submenu_id(int submenu_id) { m_submenu_id = submenu_id; }
 
     Menu* submenu();
+    const Menu* submenu() const;
 
     bool is_exclusive() const { return m_exclusive; }
     void set_exclusive(bool exclusive) { m_exclusive = exclusive; }