diff --git a/src/lib/FlightTasks/CMakeLists.txt b/src/lib/FlightTasks/CMakeLists.txt
index 1aabf393f3..95c3a85ff1 100644
--- a/src/lib/FlightTasks/CMakeLists.txt
+++ b/src/lib/FlightTasks/CMakeLists.txt
@@ -36,6 +36,7 @@ px4_add_module(
 		tasks/FlightTask.cpp
 		tasks/FlightTaskManual.cpp
 		tasks/FlightTaskOrbit.cpp
+		tasks/FlightTaskManualAltitude.cpp
 		SubscriptionArray.cpp
 		FlightTasks.cpp
 	DEPENDS
diff --git a/src/lib/FlightTasks/FlightTasks.hpp b/src/lib/FlightTasks/FlightTasks.hpp
index e179354878..8cf40a376e 100644
--- a/src/lib/FlightTasks/FlightTasks.hpp
+++ b/src/lib/FlightTasks/FlightTasks.hpp
@@ -43,6 +43,7 @@
 
 #include "tasks/FlightTask.hpp"
 #include "tasks/FlightTaskManual.hpp"
+#include "tasks/FlightTaskManualAltitude.hpp"
 #include "tasks/FlightTaskOrbit.hpp"
 #include "tasks/FlightTaskSport.hpp"
 
@@ -120,6 +121,7 @@ private:
 		~TaskUnion() {}
 
 		FlightTaskManual manual;
+		FlightTaskManualAltitude altitude;
 		FlightTaskOrbit orbit;
 		FlightTaskSport sport;
 	} _task_union; /**< storage for the currently active task */