diff --git a/MeshToolsLib/MeshGenerators/VoxelGridFromMesh.cpp b/MeshToolsLib/MeshGenerators/VoxelGridFromMesh.cpp
index 37a3e9d331d4919c5c33f934284092f96542aaae..a8d0284f27bf789bc2b3066cdaeb454a05c85624 100644
--- a/MeshToolsLib/MeshGenerators/VoxelGridFromMesh.cpp
+++ b/MeshToolsLib/MeshGenerators/VoxelGridFromMesh.cpp
@@ -86,7 +86,6 @@ std::vector<int> assignCellIds(vtkSmartPointer<vtkUnstructuredGrid> const& mesh,
     return cell_ids;
 }
 
-// PropertyVector is required to contain parameter cell_id_name
 bool removeUnusedGridCells(vtkSmartPointer<vtkUnstructuredGrid> const& mesh,
                            std::unique_ptr<MeshLib::Mesh>& grid)
 {
diff --git a/MeshToolsLib/MeshGenerators/VoxelGridFromMesh.h b/MeshToolsLib/MeshGenerators/VoxelGridFromMesh.h
index 13f6598d349af75cd842d026746d58c4375aedd5..aef731e64cd1886a5b41dfe92fb367be59c072f2 100644
--- a/MeshToolsLib/MeshGenerators/VoxelGridFromMesh.h
+++ b/MeshToolsLib/MeshGenerators/VoxelGridFromMesh.h
@@ -43,6 +43,7 @@ std::vector<int> assignCellIds(vtkSmartPointer<vtkUnstructuredGrid> const& mesh,
                                std::array<std::size_t, 3> const& dims,
                                std::array<double, 3> const& cellsize);
 
+// grid has to contain a PropertyVector with the name 'CellIds'
 bool removeUnusedGridCells(vtkSmartPointer<vtkUnstructuredGrid> const& mesh,
                            std::unique_ptr<MeshLib::Mesh>& grid);