diff --git a/src/07-poisson-problem-functions.cc b/src/07-poisson-problem-functions.cc
index 8039bea5ecbfc77112df1bf626b3b03d953b4c6f..48cabd1b5807bbb8897cb6755eb6ad644c78bcdf 100644
--- a/src/07-poisson-problem-functions.cc
+++ b/src/07-poisson-problem-functions.cc
@@ -239,11 +239,11 @@ int main(int argc, char** argv)
    {
       Dune::VTKWriter<GridView> vtkWriter(gridView);
       vtkWriter.addVertexData(xFunction, Dune::VTK::FieldInfo("solution", Dune::VTK::FieldInfo::Type::scalar, 1));
-      vtkWriter.write("07-poisson-solution-functions");
+      vtkWriter.write("07-solution");
     } {
       Dune::SubsamplingVTKWriter<GridView> vtkWriter(gridView,4);
       vtkWriter.addVertexData(xFunction, Dune::VTK::FieldInfo("solution", Dune::VTK::FieldInfo::Type::scalar, 1));
-      vtkWriter.write("07-poisson-solution-functions-subsamples");
+      vtkWriter.write("07-solution-subsampled");
     }