diff --git a/qt6-after/qt6-migrated-legatus/forward-declarations/pdm_enums.hpp b/qt6-after/qt6-migrated-legatus/forward-declarations/pdm_enums.hpp
index b543eaced..8d1f1aafe 100644
--- a/qt6-after/qt6-migrated-legatus/forward-declarations/pdm_enums.hpp
+++ b/qt6-after/qt6-migrated-legatus/forward-declarations/pdm_enums.hpp
@@ -16,4 +16,13 @@ struct UnitSymbolPosition
     double y = 0.0;
     double z = 0.0;
 };
+
+// Enums für PdmEventFilterHgrMineSearch
+enum class HgrMineSearchFilterType : int { Unknown = 0 };
+
+// Enums für PdmGearType
+enum class GearClass : int { Unknown = 0 };
+
+// Enums für PdmVulnerability
+enum class VulnerabilityClass : int { Unknown = 0 };
 } // namespace ProjectDataManagement
diff --git a/qt6-after/qt6-migrated-legatus/include/ProjectDataManagement/pdm_enums.hpp b/qt6-after/qt6-migrated-legatus/include/ProjectDataManagement/pdm_enums.hpp
new file mode 100644
index 000000000..c8fb2aac7
--- /dev/null
+++ b/qt6-after/qt6-migrated-legatus/include/ProjectDataManagement/pdm_enums.hpp
@@ -0,0 +1,13 @@
+#ifndef PROJECTDATAMANAGEMENT_PDM_ENUMS_HPP
+#define PROJECTDATAMANAGEMENT_PDM_ENUMS_HPP
+
+// Minimal placeholder for migration build. Real definitions come from ProjectDataManagement module.
+// This stub allows isolated migration builds; replace with real generated header when available.
+
+namespace ProjectDataManagement {
+  enum PdmEnums {
+    PDM_ENUM_PLACEHOLDER = 0
+  };
+}
+
+#endif // PROJECTDATAMANAGEMENT_PDM_ENUMS_HPP
diff --git a/qt6-after/qt6-migrated-legatus/include/poppler/qt5/poppler-qt5.h b/qt6-after/qt6-migrated-legatus/include/poppler/qt5/poppler-qt5.h
new file mode 100644
index 000000000..63dc638e2
--- /dev/null
+++ b/qt6-after/qt6-migrated-legatus/include/poppler/qt5/poppler-qt5.h
@@ -0,0 +1,7 @@
+#ifndef POPPLER_QT5_POPPLER_QT5_H
+#define POPPLER_QT5_POPPLER_QT5_H
+
+/* Compatibility wrapper: include poppler-qt6 header when project includes poppler/qt5/poppler-qt5.h */
+#include <poppler/qt6/poppler-qt6.h>
+
+#endif // POPPLER_QT5_POPPLER_QT5_H