diff --git a/src/NETGENPlugin/NETGENPlugin_NETGEN_3D.cxx b/src/NETGENPlugin/NETGENPlugin_NETGEN_3D.cxx
index 5c53064..90e0742 100644
--- a/src/NETGENPlugin/NETGENPlugin_NETGEN_3D.cxx
+++ b/src/NETGENPlugin/NETGENPlugin_NETGEN_3D.cxx
@@ -276,7 +276,7 @@ bool NETGENPlugin_NETGEN_3D::Compute(SMESH_Mesh&         aMesh,
     for ( n_id = nodeToNetgenID.begin(); n_id != nodeToNetgenID.end(); ++n_id )
       nodeVec[ n_id->second ] = n_id->first;
     // create and insert new nodes into nodeVec
-    int nodeIndex = Netgen_NbOfNodes;
+    int nodeIndex = Netgen_NbOfNodes + 1;
     for ( ; nodeIndex <= Netgen_NbOfNodesNew; ++nodeIndex )
     {
       Ng_GetPoint( Netgen_mesh, nodeIndex, Netgen_point );