diff --git a/dune/solvers/test/common.hh b/dune/solvers/test/common.hh
index 62c48754495926ae80e5d78ca825a545336a8914..faa25d43990abc02713c874a1e6924c685e76227 100644
--- a/dune/solvers/test/common.hh
+++ b/dune/solvers/test/common.hh
@@ -189,11 +189,11 @@ void assemblePQ1Mass(const GridView& gridView, Matrix& matrix)
                     int jGlobal = indexSet.subIndex(element, fe.localCoefficients().localKey(j).subEntity(), dim);
 
                     double zij = values[j] * zi;
-                    addToDiagonal(matrix[iGlobal][jGlobal], zij);
-                    addToDiagonal(matrix[jGlobal][iGlobal], zij);
+                    Dune::MatrixVector::addToDiagonal(matrix[iGlobal][jGlobal], zij);
+                    Dune::MatrixVector::addToDiagonal(matrix[jGlobal][iGlobal], zij);
                 }
                 double zii = values[i] * zi;
-                addToDiagonal(matrix[iGlobal][iGlobal], zii);
+                Dune::MatrixVector::addToDiagonal(matrix[iGlobal][iGlobal], zii);
             }
         }
     }