diff --git a/opm/polymer/fullyimplicit/BlackoilPolymerModel.hpp b/opm/polymer/fullyimplicit/BlackoilPolymerModel.hpp
index a69df50bb..1ce3f963c 100644
--- a/opm/polymer/fullyimplicit/BlackoilPolymerModel.hpp
+++ b/opm/polymer/fullyimplicit/BlackoilPolymerModel.hpp
@@ -227,9 +227,10 @@ namespace Opm {
         assembleMassBalanceEq(const SolutionState& state);
 
         void
-        addWellContributionToMassBalanceEq(const SolutionState& state,
-                                           const WellState& xw,
-                                           const std::vector<ADB>& cq_s);
+        addWellContributionToMassBalanceEq(const std::vector<ADB>& cq_s,
+                                           const SolutionState& state,
+                                           WellState& xw);
+
         void
         computeMassFlux(const int               actph ,
                         const V&                transi,
diff --git a/opm/polymer/fullyimplicit/BlackoilPolymerModel_impl.hpp b/opm/polymer/fullyimplicit/BlackoilPolymerModel_impl.hpp
index 19bb9be38..e4e2480b1 100644
--- a/opm/polymer/fullyimplicit/BlackoilPolymerModel_impl.hpp
+++ b/opm/polymer/fullyimplicit/BlackoilPolymerModel_impl.hpp
@@ -337,11 +337,12 @@ namespace Opm {
 
 
     template <class Grid>
-    void BlackoilPolymerModel<Grid>::addWellContributionToMassBalanceEq(const SolutionState& state,
-                                                                        const WellState& xw,
-                                                                        const std::vector<ADB>& cq_s)
+    void BlackoilPolymerModel<Grid>::addWellContributionToMassBalanceEq(const std::vector<ADB>& cq_s,
+                                                                        const SolutionState& state,
+                                                                        WellState& xw)
+
     {
-        Base::addWellContributionToMassBalanceEq(state, xw, cq_s);
+        Base::addWellContributionToMassBalanceEq(cq_s, state, xw);
 
         // Add well contributions to polymer mass balance equation
         if (has_polymer_) {