diff --git a/opm/autodiff/BlackoilModelEbos.hpp b/opm/autodiff/BlackoilModelEbos.hpp
index d331af89d..60dcb2627 100644
--- a/opm/autodiff/BlackoilModelEbos.hpp
+++ b/opm/autodiff/BlackoilModelEbos.hpp
@@ -527,12 +527,20 @@ namespace Opm {
           typedef Dune::CollectiveCommunication< Grid > communication_type;
 #endif
 
+#if DUNE_VERSION_NEWER(DUNE_ISTL, 2, 6)
+          Dune::SolverCategory::Category category() const override
+          {
+            return overlapping ?
+                   Dune::SolverCategory::overlapping : Dune::SolverCategory::sequential;
+          }
+#else
           enum {
             //! \brief The solver category.
             category = overlapping ?
                 Dune::SolverCategory::overlapping :
                 Dune::SolverCategory::sequential
           };
+#endif
 
           //! constructor: just store a reference to a matrix
           WellModelMatrixAdapter (const M& A, const WellModel& wellMod, const boost::any& parallelInformation = boost::any() )
diff --git a/opm/autodiff/CPRPreconditioner.hpp b/opm/autodiff/CPRPreconditioner.hpp
index d06512958..ab15ac4d0 100644
--- a/opm/autodiff/CPRPreconditioner.hpp
+++ b/opm/autodiff/CPRPreconditioner.hpp
@@ -385,11 +385,19 @@ createAMGPreconditionerPointer( Op& opA, const double relax, const P& comm, std:
         typedef typename X::field_type field_type;
 
         // define the category
+#if DUNE_VERSION_NEWER(DUNE_ISTL, 2, 6)
+        Dune::SolverCategory::Category category() const override
+        {
+          return std::is_same<P,Dune::Amg::SequentialInformation>::value ?
+                 Dune::SolverCategory::sequential : Dune::SolverCategory::overlapping;
+        }
+#else
         enum {
             //! \brief The category the preconditioner is part of.
             category = std::is_same<P,Dune::Amg::SequentialInformation>::value?
             Dune::SolverCategory::sequential:Dune::SolverCategory::overlapping
         };
+#endif
 
         typedef ISTLUtility::CPRSelector<M,X,X,P>  CPRSelectorType ;
 
diff --git a/opm/autodiff/ParallelOverlappingILU0.hpp b/opm/autodiff/ParallelOverlappingILU0.hpp
index 1bcc50790..bfa7fb2c1 100644
--- a/opm/autodiff/ParallelOverlappingILU0.hpp
+++ b/opm/autodiff/ParallelOverlappingILU0.hpp
@@ -22,6 +22,7 @@
 
 #include <opm/common/Exceptions.hpp>
 
+#include <dune/common/version.hh>
 #include <dune/istl/preconditioner.hh>
 #include <dune/istl/paamg/smoother.hh>
 #include <dune/istl/paamg/pinfo.hh>
@@ -227,12 +228,21 @@ protected:
     };
 
 public:
+#if DUNE_VERSION_NEWER(DUNE_ISTL, 2, 6)
+    Dune::SolverCategory::Category category() const override
+    {
+      return std::is_same<ParallelInfoT, Dune::Amg::SequentialInformation>::value ?
+              Dune::SolverCategory::sequential : Dune::SolverCategory::overlapping;
+    }
+
+#else
     // define the category
     enum {
         //! \brief The category the preconditioner is part of.
         category = std::is_same<ParallelInfoT, Dune::Amg::SequentialInformation>::value ?
             Dune::SolverCategory::sequential : Dune::SolverCategory::overlapping
     };
+#endif
 
     /*! \brief Constructor.