diff --git a/dumux/multidomain/facet/box/fvgridgeometry.hh b/dumux/multidomain/facet/box/fvgridgeometry.hh
index 0b6534da18005b39d448045482f330355b7f5afc..53ab0a028c8d24b41fe29b5c9fb722d2cb227de4 100644
--- a/dumux/multidomain/facet/box/fvgridgeometry.hh
+++ b/dumux/multidomain/facet/box/fvgridgeometry.hh
@@ -371,7 +371,7 @@ public:
     //! Constructor
     BoxFacetCouplingFVGridGeometry(const GridView gridView)
     : ParentType(gridView)
-    , facetMapper_(gridView, Dune::mcmgLayout(Dune::template Codim<dim-1>()))
+    , facetMapper_(gridView, Dune::mcmgLayout(Dune::template Codim<1>()))
     {}
 
     //! the vertex mapper is the dofMapper