diff --git a/src/one-body-sample.cc b/src/one-body-sample.cc
index c403b30bfa7d612cfda82bf95267ac19f2e36b90..38e50f7885be8ce7851bc0aee077991ff7aa44b0 100644
--- a/src/one-body-sample.cc
+++ b/src/one-body-sample.cc
@@ -108,7 +108,7 @@ void assemble_neumann(GridView const &gridView, FEBasis const &feBasis,
   BoundaryPatch<GridView> neumannBoundary(gridView, neumannNodes);
   LocalVectorType SampleVector(0);
   // FIXME: random values (time-dependent)
-  SampleVector[0] = time;
+  SampleVector[0] = 10 * sqrt(time);
   SampleVector[1] = 0;
   ConstantFunction<LocalVectorType, LocalVectorType> fNeumann(SampleVector);
   NeumannBoundaryAssembler<GridType, LocalVectorType> neumannBoundaryAssembler(