diff --git a/qt6-after/qt6-migrated-legatus/forward-declarations/generic_dtc.h b/qt6-after/qt6-migrated-legatus/forward-declarations/generic_dtc.h
index e6e1436f2..22e37f6f5 100644
--- a/qt6-after/qt6-migrated-legatus/forward-declarations/generic_dtc.h
+++ b/qt6-after/qt6-migrated-legatus/forward-declarations/generic_dtc.h
@@ -9,6 +9,12 @@ namespace DTC
 {
 class Dtc;
 class Ftc;
+
+// Generic DTC Forward-Declarations (Template-Klassen)
+template<typename T> class GenericDtc;
+template<typename T> class GenericDtcSampleInfo;
+template<typename T> class Ddtc;
+template<typename T> class DdtcSampleInfo;
 } // namespace DTC
 } // namespace DDS