diff --git a/dune/solvers/norms/diagnorm.hh b/dune/solvers/norms/diagnorm.hh
index 0b00b12d417a6c06feef690f90859c73296668a3..54a86fccd73bff3b5c1257c525d9209872eebb73 100644
--- a/dune/solvers/norms/diagnorm.hh
+++ b/dune/solvers/norms/diagnorm.hh
@@ -11,7 +11,7 @@
   *  \tparam Diagonal some container type having the random access operator[]; used to store the diagonal entries of the matrix
   *  \tparam VectorType the vector type the norm may be applied to
   */
-template <class Diagonal, class VectorType>
+template <class Diagonal=Dune::BlockVector<Dune::FieldVector <double,1> >, class VectorType=Dune::BlockVector<Dune::FieldVector <double,1> > >
 class DiagNorm:
     public Norm<VectorType>
 {
diff --git a/dune/solvers/norms/fullnorm.hh b/dune/solvers/norms/fullnorm.hh
index 0dc3d48af6b795051275e97b560fa0c84ed12830..564368259d051c8dcc86e161f93bab81dda36cf2 100644
--- a/dune/solvers/norms/fullnorm.hh
+++ b/dune/solvers/norms/fullnorm.hh
@@ -14,7 +14,7 @@
  * \tparam LowRankFactor the type of the factor used to represent the low rank operator
  * \tparam VectorType the vector type the norm may be applied to
  */
-template <class LowRankFactor, class VectorType>
+template <class LowRankFactor=Dune::BlockVector<Dune::FieldVector <double,1> >, class VectorType=Dune::BlockVector<Dune::FieldVector <double,1> > >
 class FullNorm: public Norm<VectorType>
 {
     public: