diff --git a/meson.build b/meson.build
index 38dc1a1..d4e6e84 100644
--- a/meson.build
+++ b/meson.build
@@ -13,6 +13,8 @@ executable(
     './src/Widget.cpp',
     './src/Button.cpp',
     './src/DocumentLayout.cpp',
+    './src/HorizontalBoxLayout.cpp',
+    './src/VerticalBoxLayout.cpp',
     './src/Label.cpp',
     './src/main.cpp',
     dependencies : [cairomm_dep, xlib_dep, pangocairo_dep]