diff --git a/qt6-after/qt6-migrated-legatus/include/ExerciseManagement/exm_dtc.h b/qt6-after/qt6-migrated-legatus/include/ExerciseManagement/exm_dtc.h
index b7876685a..0ed8d59a7 100644
--- a/qt6-after/qt6-migrated-legatus/include/ExerciseManagement/exm_dtc.h
+++ b/qt6-after/qt6-migrated-legatus/include/ExerciseManagement/exm_dtc.h
@@ -6,6 +6,10 @@
 #include "exm_exercise.h"
 #include "ParticipantManagement/ppm_enums.hpp"
 #include "FileManagement/flm_db.h"
+// FileManagement::Folder (folders()/m_folders) ist ein echt generierter
+// DDS-Typ und wird — wie im original von ddsdtc generierten exm_dtc.h über
+// exm_dtc_types.h — aus der generierten flm.hpp (Build-Tree) eingebunden.
+#include "FileManagement/flm.hpp"
 
 #include <QtCore/QObject>
 #include <QtCore/QList>