diff --git a/src/lib/FlightTasks/CMakeLists.txt b/src/lib/FlightTasks/CMakeLists.txt
index 2f22377926..4484259557 100644
--- a/src/lib/FlightTasks/CMakeLists.txt
+++ b/src/lib/FlightTasks/CMakeLists.txt
@@ -39,6 +39,7 @@ px4_add_module(
 		tasks/FlightTaskOrbit.cpp
 		tasks/FlightTaskManualAltitude.cpp
 		tasks/FlightTaskManualPosition.cpp
+		tasks/Utility/ManualSmoothingZ.cpp
 		SubscriptionArray.cpp
 		FlightTasks.cpp
 	DEPENDS