diff --git a/src/lib/ecl/CMakeLists.txt b/src/lib/ecl/CMakeLists.txt
index 0830521ec0..0fd5b5f5e9 100644
--- a/src/lib/ecl/CMakeLists.txt
+++ b/src/lib/ecl/CMakeLists.txt
@@ -40,6 +40,8 @@ px4_add_module(
 		attitude_fw/ecl_roll_controller.cpp
 		attitude_fw/ecl_yaw_controller.cpp
 		l1/ecl_l1_pos_controller.cpp
+		validation/data_validator.cpp
+		validation/data_validator_group.cpp
 	DEPENDS
 		platforms__common
 	)