diff --git a/opm/material/fluidmatrixinteractions/PiecewiseLinearTwoPhaseMaterial.hpp b/opm/material/fluidmatrixinteractions/PiecewiseLinearTwoPhaseMaterial.hpp
index 19ba477ab..7c5f9afb1 100644
--- a/opm/material/fluidmatrixinteractions/PiecewiseLinearTwoPhaseMaterial.hpp
+++ b/opm/material/fluidmatrixinteractions/PiecewiseLinearTwoPhaseMaterial.hpp
@@ -109,7 +109,7 @@ public:
      *        pressure differences.
      */
     template <class Container, class FluidState>
-    static void saturations(Container &values, const Params &params, const FluidState &fs)
+    static void saturations(Container& /* values */, const Params& /* params */, const FluidState& /* fs */)
     { OPM_THROW(std::logic_error, "Not implemented: saturations()"); }
 
     /*!
@@ -152,11 +152,11 @@ public:
      * \brief The saturation-capillary pressure curve
      */
     template <class FluidState, class Evaluation = typename FluidState::Scalar>
-    static Evaluation Sw(const Params &params, const FluidState &fs)
+    static Evaluation Sw(const Params& /* params */, const FluidState& /* fs */)
     { OPM_THROW(std::logic_error, "Not implemented: Sw()"); }
 
     template <class Evaluation>
-    static Evaluation twoPhaseSatSw(const Params &params, const Evaluation& pC)
+    static Evaluation twoPhaseSatSw(const Params& /* params */, const Evaluation& /* pC */)
     { OPM_THROW(std::logic_error, "Not implemented: twoPhaseSatSw()"); }
 
     /*!