diff --git a/libsrc/gprim/splinegeometry.hpp b/libsrc/gprim/splinegeometry.hpp
index d29adbc4..16574516 100644
--- a/libsrc/gprim/splinegeometry.hpp
+++ b/libsrc/gprim/splinegeometry.hpp
@@ -29,6 +29,7 @@ namespace netgen
     Array < GeomPoint<D> > geompoints;
     Array < SplineSeg<D>* > splines;
 
+    SplineGeometry() : geompoints{}, splines{} { ; }
     DLL_HEADER ~SplineGeometry();
 
     DLL_HEADER int Load (const Array<double> & raw_data, const int startpos = 0);