diff --git a/src/one-body-sample.cc b/src/one-body-sample.cc
index f5d725aad3a5ac4372f9fb88b126482969b4ca1f..544550939255a9e048cfc0f82afd10b694ab0855 100644
--- a/src/one-body-sample.cc
+++ b/src/one-body-sample.cc
@@ -94,7 +94,7 @@ void assemble_neumann(GridView const &gridView, FEBasis const &feBasis,
   BoundaryPatch<GridView> neumannBoundary(gridView, neumannNodes);
   LocalVectorType SampleVector(0);
   // FIXME: random values
-  SampleVector[0] = 1;
+  SampleVector[0] = 1 + run / 1000;
   SampleVector[1] = 2;
   ConstantFunction<LocalVectorType, LocalVectorType> fNeumann(SampleVector);
   NeumannBoundaryAssembler<GridType, LocalVectorType> neumannBoundaryAssembler(