diff --git a/common/mpihelper.hh b/common/mpihelper.hh
index 7208d515f75f3e8414c7143deb2cc8dfc77664a4..c6f9c8a8cef888a69c1a72791b85c2c34a050edc 100644
--- a/common/mpihelper.hh
+++ b/common/mpihelper.hh
@@ -1,6 +1,6 @@
 // -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 // vi: set et ts=4 sw=2 sts=2:
-// $Id: $
+// $Id:$
 #ifndef DUNE_MPIHELPER
 #define DUNE_MPIHELPER
 #if HAVE_MPI
@@ -45,6 +45,9 @@ namespace Dune
    * If one wants to have sequential program even if the code is
    * compiled with mpi then one simply has to exchange the typedef
    * with \code typedef Dune::MPIHelper FakeMPIHelper; \endcode.
+   *
+   * For checking whether we really use MPI or just fake please use
+   * MPIHelper::isFake (this is also possible at compile time!)
    */
   /**
    * @brief A fake mpi helper.
@@ -126,7 +129,7 @@ namespace Dune
      * that the main method of the program was called:
      * \code
      * int main(int argc, char** argv){
-     *   MPIHelper::instance(&argc, &argv);
+     *   MPIHelper::instance(argc, argv);
      *   // program code comes here
      *   ...
      * }
@@ -229,7 +232,7 @@ namespace Dune
      * that the main method of the program was called:
      * \code
      * int main(int argc, char** argv){
-     *   MPIHelper::instance(&argc, &argv);
+     *   MPIHelper::instance(argc, argv);
      *   // program code comes here
      *   ...
      * }