--- a/src/SbpOperators/boundaryops/normal_derivative.jl	Sat Jul 17 18:07:15 2021 +0200
+++ b/src/SbpOperators/boundaryops/normal_derivative.jl	Sat Jul 17 18:13:20 2021 +0200
@@ -9,10 +9,10 @@
 On a one-dimensional `grid`, `d` is a `BoundaryOperator`. On a multi-dimensional `grid`, `d` is the inflation of
 a `BoundaryOperator`. Also see the documentation of `SbpOperators.boundary_operator(...)` for more details.
 """
-function normal_derivative(grid::EquidistantGrid, closure_stencil::Stencil, boundary::CartesianBoundary)
+function normal_derivative(grid::EquidistantGrid, closure_stencil, boundary::CartesianBoundary)
     direction = dim(boundary)
     h_inv = inverse_spacing(grid)[direction]
     return SbpOperators.boundary_operator(grid, scale(closure_stencil,h_inv), boundary)
 end
-normal_derivative(grid::EquidistantGrid{1}, closure_stencil::Stencil, region::Region) = normal_derivative(grid, closure_stencil, CartesianBoundary{1,typeof(region)}())
+normal_derivative(grid::EquidistantGrid{1}, closure_stencil, region::Region) = normal_derivative(grid, closure_stencil, CartesianBoundary{1,typeof(region)}())
 export normal_derivative