diff --git a/src/NETGENPlugin/NETGENPlugin_NETGEN_2D_ONLY.hxx b/src/NETGENPlugin/NETGENPlugin_NETGEN_2D_ONLY.hxx
index 2be5858..14b3b2c 100644
--- a/src/NETGENPlugin/NETGENPlugin_NETGEN_2D_ONLY.hxx
+++ b/src/NETGENPlugin/NETGENPlugin_NETGEN_2D_ONLY.hxx
@@ -70,6 +70,9 @@ public:
   virtual bool Compute(SMESH_Mesh&         aMesh,
                        const TopoDS_Shape& aShape);
 
+  virtual bool Evaluate(SMESH_Mesh& aMesh, const TopoDS_Shape& aShape,
+                        MapShapeNbElems& aResMap);
+
   /*static TError AddSegmentsToMesh(netgen::Mesh&                    ngMesh,
                                 OCCGeometry&                     geom,
                                 const TSideVector&               wires,