diff --git a/meson.build b/meson.build
index 4328a1e..c2e5fb6 100644
--- a/meson.build
+++ b/meson.build
@@ -11,6 +11,7 @@
 
 src_common = files(
     'compositor/DrmKmsPlan.cpp',
+    'compositor/FlatteningController.cpp',
     'backend/BackendManager.cpp',
     'backend/Backend.cpp',
     'backend/BackendClient.cpp',