diff --git a/dumux/discretization/cellcentered/mpfa/fvelementgeometry.hh b/dumux/discretization/cellcentered/mpfa/fvelementgeometry.hh
index 781a11a0a684f23e0e44a5c9b0bfba4c04812e45..25f8dcd04044a14b4b525cdddaafde315b2ce83e 100644
--- a/dumux/discretization/cellcentered/mpfa/fvelementgeometry.hh
+++ b/dumux/discretization/cellcentered/mpfa/fvelementgeometry.hh
@@ -126,10 +126,10 @@ public:
                                                  ScvfIterator(g.scvfIndicesOfScv(scvIdx).end(), fvGeometry));
     }
 
-    //! number of sub control volumes in this fv element geometry
-    std::size_t numScv() const
+    //! number of sub control volumes in this fv element geometry (always one for cc schemes)
+    static constexpr std::size_t numScv()
     {
-        return scvIndices_.size();
+        return 1;
     }
 
     //! number of sub control volumes in this fv element geometry
@@ -247,9 +247,9 @@ public:
         return Dune::IteratorRange<IteratorType>(g.scvfs_.begin(), g.scvfs_.end());
     }
 
-    //! number of sub control volumes in this fv element geometry
-    std::size_t numScv() const
-    { return scvs_.size(); }
+    //! number of sub control volumes in this fv element geometry (always one for cc schemes)
+    static constexpr std::size_t numScv()
+    { return 1; }
 
     //! number of sub control volumes in this fv element geometry
     std::size_t numScvf() const
diff --git a/dumux/discretization/cellcentered/tpfa/fvelementgeometry.hh b/dumux/discretization/cellcentered/tpfa/fvelementgeometry.hh
index fb1cf2a7fdee4c221e59a3c50231809ce5e25106..bc5ee8d631bd4b0c18453204663df518e0af2fd6 100644
--- a/dumux/discretization/cellcentered/tpfa/fvelementgeometry.hh
+++ b/dumux/discretization/cellcentered/tpfa/fvelementgeometry.hh
@@ -127,10 +127,10 @@ public:
                                                  ScvfIterator(g.scvfIndicesOfScv(scvIdx).end(), fvGeometry));
     }
 
-    //! number of sub control volumes in this fv element geometry
-    std::size_t numScv() const
+    //! number of sub control volumes in this fv element geometry (always one for cc schemes)
+    static constexpr std::size_t numScv()
     {
-        return scvIndices_.size();
+        return 1;
     }
 
     //! number of sub control volumes in this fv element geometry
@@ -261,9 +261,9 @@ public:
         return Dune::IteratorRange<IteratorType>(g.scvfs_.begin(), g.scvfs_.end());
     }
 
-    //! number of sub control volumes in this fv element geometry
-    std::size_t numScv() const
-    { return scvs_.size(); }
+    //! number of sub control volumes in this fv element geometry (always one for cc schemes)
+    static constexpr std::size_t numScv()
+    { return 1; }
 
     //! number of sub control volumes in this fv element geometry
     std::size_t numScvf() const