diff --git a/Base/res/icons/16x16/box.png b/Base/res/icons/16x16/box.png
new file mode 100644
index 00000000000..83250ec89c2
Binary files /dev/null and b/Base/res/icons/16x16/box.png differ
diff --git a/Ladybird/Qt/BrowserWindow.cpp b/Ladybird/Qt/BrowserWindow.cpp
index 937ca066e99..db1de920bc7 100644
--- a/Ladybird/Qt/BrowserWindow.cpp
+++ b/Ladybird/Qt/BrowserWindow.cpp
@@ -441,6 +441,7 @@ BrowserWindow::BrowserWindow(Vector<URL::URL> const& initial_urls, IsPopupWindow
 
     m_show_line_box_borders_action = new QAction("Show Line Box Borders", this);
     m_show_line_box_borders_action->setCheckable(true);
+    m_show_line_box_borders_action->setIcon(load_icon_from_uri("resource://icons/16x16/box.png"sv));
     debug_menu->addAction(m_show_line_box_borders_action);
     QObject::connect(m_show_line_box_borders_action, &QAction::triggered, this, [this] {
         bool state = m_show_line_box_borders_action->isChecked();
diff --git a/Ladybird/cmake/ResourceFiles.cmake b/Ladybird/cmake/ResourceFiles.cmake
index 996b0d90c19..0c5a285e8c0 100644
--- a/Ladybird/cmake/ResourceFiles.cmake
+++ b/Ladybird/cmake/ResourceFiles.cmake
@@ -6,6 +6,7 @@ list(TRANSFORM FONTS PREPEND "${LADYBIRD_SOURCE_DIR}/Base/res/fonts/")
 
 set(16x16_ICONS
     app-system-monitor.png
+    box.png
     audio-volume-high.png
     audio-volume-muted.png
     close-tab.png