diff --git a/dumux/implicit/box/boxfvelementgeometry.hh b/dumux/implicit/box/boxfvelementgeometry.hh
index a751e7ff5ae8595a10eb74c35b748a9942cce2e1..138ce1b203033e16b3f2dc8cf1f961bb6f032a87 100644
--- a/dumux/implicit/box/boxfvelementgeometry.hh
+++ b/dumux/implicit/box/boxfvelementgeometry.hh
@@ -945,8 +945,8 @@ public:
 
                 JacobianInverseTransposed jacInvT =
                     geometry.jacobianInverseTransposed(subContVol[scvIdx].localCenter);
-                for (int scvIdx = 0; scvIdx < numScv; scvIdx++)
-                    jacInvT.mv(localJac[scvIdx][0], subContVol[scvIdx].gradCenter[scvIdx]);
+                for (int vert = 0; vert < numScv; vert++)
+                    jacInvT.mv(localJac[vert][0], subContVol[scvIdx].gradCenter[vert]);
             }
         }
     }