diff --git a/qt6-after/qt6-migrated-legatus/Lts/Common/CommonUnitTestsPlaceholder/mocks/MockCoordTrans.h b/qt6-after/qt6-migrated-legatus/Lts/Common/CommonUnitTestsPlaceholder/mocks/MockCoordTrans.h
new file mode 100644
index 000000000..ee443a9c9
--- /dev/null
+++ b/qt6-after/qt6-migrated-legatus/Lts/Common/CommonUnitTestsPlaceholder/mocks/MockCoordTrans.h
@@ -0,0 +1,19 @@
+// MockCoordTrans.h - Stub mock for CoordTrans functionality
+// This is a placeholder to allow builds without full CoordTrans implementation
+
+#ifndef MOCK_COORD_TRANS_H
+#define MOCK_COORD_TRANS_H
+
+#include <QString>
+#include <QPointF>
+
+// Minimal stub to satisfy linker requirements
+namespace LtsCoordTrans {
+    // Placeholder types
+    struct UtmCoordinate {
+        static UtmCoordinate fromMgrs(const QString&) { return UtmCoordinate(); }
+        QPointF geographic() const { return QPointF(); }
+    };
+}
+
+#endif // MOCK_COORD_TRANS_H
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