diff --git a/libsrc/general/mpi_interface.hpp b/libsrc/general/mpi_interface.hpp
index fbe02bed..475ea7ee 100644
--- a/libsrc/general/mpi_interface.hpp
+++ b/libsrc/general/mpi_interface.hpp
@@ -35,6 +35,19 @@ namespace netgen
   inline MPI_Datatype MyGetMPIType<double> ( ) 
   { return MPI_DOUBLE; }
 
+  
+  template <int S> class Vec;
+  template <> 
+  inline MPI_Datatype MyGetMPIType<Vec<3> > ()
+  {
+    static MPI_Datatype MPI_T = 0;
+    if (!MPI_T)
+      {
+	MPI_Type_contiguous ( 3, MPI_DOUBLE, &MPI_T);
+	MPI_Type_commit ( &MPI_T );
+      }
+    return MPI_T;
+  };
 
 
   inline void MyMPI_Send (int i, int dest, int tag)