diff --git a/libsrc/csg/algprim.cpp b/libsrc/csg/algprim.cpp
index e43b0022..8aa9be73 100644
--- a/libsrc/csg/algprim.cpp
+++ b/libsrc/csg/algprim.cpp
@@ -642,6 +642,32 @@ namespace netgen
     cz = v(2);
   }
 
+  void Ellipsoid :: GetPrimitiveData (const char *& classname, NgArray<double> & coeffs) const
+  {
+    classname = "ellipsoid";
+    coeffs.SetSize (12);
+    for(auto i : Range(3))
+      {
+        coeffs[i] = a(i);
+        coeffs[3+i] = v1(i);
+        coeffs[6+i] = v2(i);
+        coeffs[9+i] = v3(i);
+      }
+  }
+
+  void Ellipsoid :: SetPrimitiveData (NgArray<double> & coeffs)
+  {
+    for(auto i : Range(3))
+      {
+        a(i) = coeffs[i];
+        v1(i) = coeffs[3+i];
+        v2(i) = coeffs[6+i];
+        v3(i) = coeffs[9+i];
+      }
+
+    CalcData();
+  }
+
 
   INSOLID_TYPE Ellipsoid :: BoxInSolid (const BoxSphere<3> & box) const
   {
diff --git a/libsrc/csg/algprim.hpp b/libsrc/csg/algprim.hpp
index fde47dc4..e32b0eee 100644
--- a/libsrc/csg/algprim.hpp
+++ b/libsrc/csg/algprim.hpp
@@ -339,23 +339,26 @@ namespace netgen
     // default constructor for archive
     Ellipsoid() {}
 
-    virtual void DoArchive(Archive& ar)
+    void DoArchive(Archive& ar) override
     {
       QuadraticSurface::DoArchive(ar);
       ar & a & v1 & v2 & v3 & rmin;
     }
     ///
-    virtual INSOLID_TYPE BoxInSolid (const BoxSphere<3> & box) const;
+    INSOLID_TYPE BoxInSolid (const BoxSphere<3> & box) const override;
     ///
-    virtual double HesseNorm () const;
+    double HesseNorm () const override;
     ///
-    virtual double MaxCurvature () const;
+    double MaxCurvature () const override;
     ///
-    virtual Point<3> GetSurfacePoint () const;
+    Point<3> GetSurfacePoint () const override;
 
-    virtual void GetTriangleApproximation (TriangleApproximation & tas, 
+    void GetTriangleApproximation (TriangleApproximation & tas,
 					   const Box<3> & bbox, 
-					   double facets) const;
+					   double facets) const override;
+
+    void GetPrimitiveData (const char *& classname, NgArray<double> & coeffs) const override;
+    void SetPrimitiveData (NgArray<double> & coeffs) override;
 
   private:
     void CalcData();
diff --git a/libsrc/csg/csgeom.cpp b/libsrc/csg/csgeom.cpp
index fa4c78f7..4874f0a9 100644
--- a/libsrc/csg/csgeom.cpp
+++ b/libsrc/csg/csgeom.cpp
@@ -562,6 +562,15 @@ namespace netgen
 	    delete_them.Append(cone);
 	  }
 
+	else if(classname == "ellipsoid")
+	  {
+	    Ellipsoid * ellipsoid = new Ellipsoid(dummypoint,dummyvec,dummyvec,dummyvec);
+	    ellipsoid->SetPrimitiveData(coeffs);
+
+	    AddSurface(ellipsoid);
+	    delete_them.Append(ellipsoid);
+	  }
+
        else if(classname == "ellipticcone")
          {
 	    EllipticCone * ellipticcone = new EllipticCone(dummypoint,dummyvec,dummyvec,dummydouble,dummydouble);