diff --git a/src/serializers/TtlWktSerializer.cpp b/src/serializers/TtlWktSerializer.cpp
index ad3acc1c15..c3b36cd892 100644
--- a/src/serializers/TtlWktSerializer.cpp
+++ b/src/serializers/TtlWktSerializer.cpp
@@ -29,6 +29,8 @@
 #include <ShapeAnalysis_FreeBounds.hxx>
 #include <BRepTools_WireExplorer.hxx>
 #include <TopoDS.hxx>
+#include <Bnd_Box.hxx>
+#include <gp_Pln.hxx>
 
 #endif