diff --git a/demos/FiniteVolume/stencil_field.hpp b/demos/FiniteVolume/stencil_field.hpp
index a7cb4d544..f2a73fcae 100644
--- a/demos/FiniteVolume/stencil_field.hpp
+++ b/demos/FiniteVolume/stencil_field.hpp
@@ -181,7 +181,7 @@ namespace samurai
             auto vel_at_interface = xt::eval(3. / 8 * vel(0, level, i + 1, j) + 3. / 4 * vel(0, level, i, j)
                                              - 1. / 8 * vel(0, level, i - 1, j));
 
-            auto denom                   = xt::eval(u(level, i + 1, j) - u(level, i + 2, j));
+            auto denom                   = xt::eval(u(level, i + 1, j) - u(level, i, j));
             auto mask                    = xt::abs(denom) < 1.e-8;
             xt::masked_view(denom, mask) = 1.e-8;
 
diff --git a/test/reference/finite_volume/test_finite_volume_demo_finite-volume-level-set-0.1.h5 b/test/reference/finite_volume/test_finite_volume_demo_finite-volume-level-set-0.1.h5
index 344e6b45d..d9e521b38 100644
Binary files a/test/reference/finite_volume/test_finite_volume_demo_finite-volume-level-set-0.1.h5 and b/test/reference/finite_volume/test_finite_volume_demo_finite-volume-level-set-0.1.h5 differ
diff --git a/test/reference/finite_volume/test_finite_volume_demo_finite-volume-level-set-from-scratch-0.1.h5 b/test/reference/finite_volume/test_finite_volume_demo_finite-volume-level-set-from-scratch-0.1.h5
index 0fec0e3fc..a5c7f3507 100644
Binary files a/test/reference/finite_volume/test_finite_volume_demo_finite-volume-level-set-from-scratch-0.1.h5 and b/test/reference/finite_volume/test_finite_volume_demo_finite-volume-level-set-from-scratch-0.1.h5 differ