diff --git a/libsrc/include/nginterface_v2.hpp b/libsrc/include/nginterface_v2.hpp
index 16184d45..580a340a 100644
--- a/libsrc/include/nginterface_v2.hpp
+++ b/libsrc/include/nginterface_v2.hpp
@@ -300,6 +300,8 @@ namespace netgen
     int GetParentElement (int ei) const;
     int GetParentSElement (int ei) const;
 
+    int GetNIdentifications() const;
+    int GetIdentificationType(int idnr) const;
     Ng_Buffer<int[2]> GetPeriodicVertices(int idnr) const;
 
     // Find element of point, returns local coordinates
diff --git a/libsrc/include/nginterface_v2_impl.hpp b/libsrc/include/nginterface_v2_impl.hpp
index 938efbf8..06e7fa22 100644
--- a/libsrc/include/nginterface_v2_impl.hpp
+++ b/libsrc/include/nginterface_v2_impl.hpp
@@ -300,7 +300,7 @@ template <> NGX_INLINE DLL_HEADER const Ng_Node<2> Ngx_Mesh :: GetNode<2> (int n
 NGX_INLINE DLL_HEADER Ng_Buffer<int[2]> Ngx_Mesh :: GetPeriodicVertices(int idnr) const
 {
   Array<INDEX_2> apairs;
-  mesh->GetIdentifications().GetPairs (idnr, apairs);
+  mesh->GetIdentifications().GetPairs (idnr+1, apairs);
   for(auto& ind : apairs)
     {
       ind.I1()--;
diff --git a/libsrc/interface/nginterface_v2.cpp b/libsrc/interface/nginterface_v2.cpp
index 1f8ecbbd..1a776acb 100644
--- a/libsrc/interface/nginterface_v2.cpp
+++ b/libsrc/interface/nginterface_v2.cpp
@@ -720,6 +720,16 @@ namespace netgen
       return -1;
   }
 
+  int Ngx_Mesh :: GetNIdentifications () const
+  {
+    return mesh->GetIdentifications().GetMaxNr();
+  }
+
+  int Ngx_Mesh :: GetIdentificationType(int idnr) const
+  {
+    return mesh->GetIdentifications().GetType(idnr+1);
+  }
+