diff --git a/src/one-body-sample.cc b/src/one-body-sample.cc
index 6e71dfb2ef78aa54691bae8c555570e6bc507d69..cc5ece24d241498c30ef7c021212c79593569985 100644
--- a/src/one-body-sample.cc
+++ b/src/one-body-sample.cc
@@ -169,7 +169,7 @@ int main() {
                                                             neumannNodes);
 
       { // constant 1D function
-        std::vector<Dune::FieldVector<double, 1>> b;
+        std::vector<Dune::FieldVector<double, 1>> nodalIntegrals;
         ConstantFunction<SmallVector, Dune::FieldVector<double, 1>>
         constantOneFunction(1);
         NeumannBoundaryAssembler<GridType, Dune::FieldVector<double, 1>>
@@ -178,7 +178,7 @@ int main() {
         BoundaryFunctionalAssembler<P1Basis> boundaryFunctionalAssembler(
             p1Basis, neumannBoundary);
         boundaryFunctionalAssembler.assemble(
-            neumannBoundaryAssembler, b,
+            neumannBoundaryAssembler, nodalIntegrals,
             true); // resize the output vector and zero all of its entries
       }