diff --git a/vtkm/filter/MarchingCubes.hxx b/vtkm/filter/MarchingCubes.hxx
index 8cdcaeffe..4a091602c 100644
--- a/vtkm/filter/MarchingCubes.hxx
+++ b/vtkm/filter/MarchingCubes.hxx
@@ -203,6 +203,20 @@ public:
       vtkm::Id outputCellId,
       vtkm::IdComponent visitIndex,
       const IndicesVecType &indices) const
+  {
+  }
+
+  template<typename FieldInType, // Vec-like, one per input point
+           typename CoordType,
+           typename IndicesVecType>
+  VTKM_EXEC_EXPORT
+  void operator()(
+      vtkm::CellShapeTagHexahedron shape,
+      const FieldInType &fieldIn, // Input point field defining the contour
+      const CoordType &coords, // Input point coordinates
+      vtkm::Id outputCellId,
+      vtkm::IdComponent visitIndex,
+      const IndicesVecType &indices) const
   {
     const vtkm::Id outputPointId = 3 * outputCellId;
     typedef typename vtkm::VecTraits<FieldInType>::ComponentType FieldType;