diff --git a/dune/vtkgridfunction.hh b/dune/vtkgridfunction.hh
index f127fd1d50c964287c44383a6e08f9e9d9636e4e..bdb12f9b1f5cc2a4f967a26e64925b92bca12fdf 100644
--- a/dune/vtkgridfunction.hh
+++ b/dune/vtkgridfunction.hh
@@ -3,6 +3,7 @@
 
 #include <dune/grid/io/file/vtk/function.hh>
 
+namespace Dune {
 /** \brief A VTK basis grid function.
  *
  *	This function "evaluates" by evaluating the global basis and
@@ -74,5 +75,5 @@ class VTKBasisGridFunction
   const CoefficientType& coeffs_;
   std::string s_;
 };
-
+}
 #endif