diff --git a/opm/material/fluidmatrixinteractions/MaterialTraits.hpp b/opm/material/fluidmatrixinteractions/MaterialTraits.hpp
index e2b88e2bf..03321344b 100644
--- a/opm/material/fluidmatrixinteractions/MaterialTraits.hpp
+++ b/opm/material/fluidmatrixinteractions/MaterialTraits.hpp
@@ -37,16 +37,13 @@ namespace Opm {
  *
  * This traits class is intended to be used by the NullMaterial
  */
-template <class ScalarT, int numPhasesV, class EvaluationT = ScalarT>
+template <class ScalarT, int numPhasesV>
 class NullMaterialTraits
 {
 public:
     //! The type used for scalar floating point values
     typedef ScalarT Scalar;
 
-    //! Representation of a function evaluation and all its relevant derivatives
-    typedef EvaluationT Evaluation;
-
     //! The number of fluid phases
     static const int numPhases = numPhasesV;
 };
@@ -56,16 +53,13 @@ public:
  *
  * \brief A generic traits class for two-phase material laws.
  */
-template <class ScalarT, int wettingPhaseIdxV, int nonWettingPhaseIdxV, class EvaluationT = ScalarT>
+template <class ScalarT, int wettingPhaseIdxV, int nonWettingPhaseIdxV>
 class TwoPhaseMaterialTraits
 {
 public:
     //! The type used for scalar floating point values
     typedef ScalarT Scalar;
 
-    //! Representation of a function evaluation and all its relevant derivatives
-    typedef EvaluationT Evaluation;
-
     //! The number of fluid phases
     static const int numPhases = 2;
 
@@ -85,16 +79,13 @@ public:
  *
  * \brief A generic traits class for three-phase material laws.
  */
-template <class ScalarT, int wettingPhaseIdxV, int nonWettingasPhaseIdxV, int gasPhaseIdxV, class EvaluationT = ScalarT>
+template <class ScalarT, int wettingPhaseIdxV, int nonWettingasPhaseIdxV, int gasPhaseIdxV>
 class ThreePhaseMaterialTraits
 {
 public:
     //! The type used for scalar floating point values
     typedef ScalarT Scalar;
 
-    //! Representation of a function evaluation and all its relevant derivatives
-    typedef EvaluationT Evaluation;
-
     //! The number of fluid phases
     static const int numPhases = 3;