diff --git a/src/assemblers.cc b/src/assemblers.cc
index 1449acc247e8f2055d658e5ddce50a241cbc2244..eade2af8b48176b945212e8e42364d7899bba987 100644
--- a/src/assemblers.cc
+++ b/src/assemblers.cc
@@ -21,7 +21,6 @@ void assemble_neumann(GridView const &gridView, AssemblerType const &assembler,
   BoundaryPatch<GridView> const neumannBoundary(gridView, neumannNodes);
   LocalVectorType SampleVector(0);
   neumann.evaluate(time, SampleVector[0]);
-  SampleVector[1] = 0;
   ConstantFunction<LocalVectorType, LocalVectorType> const fNeumann(
       SampleVector);
   NeumannBoundaryAssembler<typename GridView::Grid, LocalVectorType>