diff --git a/opm/simulators/wells/MultisegmentWellAssemble.cpp b/opm/simulators/wells/MultisegmentWellAssemble.cpp
index 827aa1e0b..f6a7c7254 100644
--- a/opm/simulators/wells/MultisegmentWellAssemble.cpp
+++ b/opm/simulators/wells/MultisegmentWellAssemble.cpp
@@ -242,6 +242,26 @@ assembleOutflowTerm(const int seg,
     // pressure derivative should be zero
 }
 
+template<class FluidSystem, class Indices, class Scalar>
+void MultisegmentWellAssemble<FluidSystem,Indices,Scalar>::
+assembleInflowTerm(const int seg,
+                   const int inlet,
+                   const int inlet_upwind,
+                   const int comp_idx,
+                   const EvalWell& inlet_rate,
+                   Equations& eqns) const
+ {
+    eqns.resWell_[seg][comp_idx] += inlet_rate.value();
+    eqns.duneD_[seg][inlet][comp_idx][WQTotal] += inlet_rate.derivative(WQTotal + Indices::numEq);
+    if (FluidSystem::phaseIsActive(FluidSystem::waterPhaseIdx)) {
+        eqns.duneD_[seg][inlet_upwind][comp_idx][WFrac] += inlet_rate.derivative(WFrac + Indices::numEq);
+    }
+    if (FluidSystem::phaseIsActive(FluidSystem::gasPhaseIdx)) {
+        eqns.duneD_[seg][inlet_upwind][comp_idx][GFrac] += inlet_rate.derivative(GFrac + Indices::numEq);
+    }
+    // pressure derivative should be zero
+}
+
 #define INSTANCE(...) \
 template class MultisegmentWellAssemble<BlackOilFluidSystem<double,BlackOilDefaultIndexTraits>,__VA_ARGS__,double>;
 
diff --git a/opm/simulators/wells/MultisegmentWellAssemble.hpp b/opm/simulators/wells/MultisegmentWellAssemble.hpp
index 6eb246d44..43e768614 100644
--- a/opm/simulators/wells/MultisegmentWellAssemble.hpp
+++ b/opm/simulators/wells/MultisegmentWellAssemble.hpp
@@ -116,6 +116,14 @@ public:
                         const EvalWell& segment_rate,
                         Equations& eqns1) const;
 
+    //! \brief Assemble inflow term.
+    void assembleInflowTerm(const int seg,
+                            const int inlet,
+                            const int inlet_upwind,
+                            const int comp_idx,
+                            const EvalWell& inlet_rate,
+                            Equations& eqns) const;
+
 private:
     const WellInterfaceIndices<FluidSystem,Indices,Scalar>& well_; //!< Reference to well
 };
diff --git a/opm/simulators/wells/MultisegmentWell_impl.hpp b/opm/simulators/wells/MultisegmentWell_impl.hpp
index 480fbcc43..9e1e3f97a 100644
--- a/opm/simulators/wells/MultisegmentWell_impl.hpp
+++ b/opm/simulators/wells/MultisegmentWell_impl.hpp
@@ -1583,19 +1583,9 @@ namespace Opm
                 for (const int inlet : this->segment_inlets_[seg]) {
                     for (int comp_idx = 0; comp_idx < this->num_components_; ++comp_idx) {
                         const EvalWell inlet_rate = this->getSegmentRateUpwinding(inlet, comp_idx) * this->well_efficiency_factor_;
-
                         const int inlet_upwind = this->upwinding_segments_[inlet];
-                        // inlet_rate contains the derivatives with respect to WQTotal in inlet,
-                        // and WFrac and GFrac in inlet_upwind
-                        this->linSys_.resWell_[seg][comp_idx] += inlet_rate.value();
-                        this->linSys_.duneD_[seg][inlet][comp_idx][WQTotal] += inlet_rate.derivative(WQTotal + Indices::numEq);
-                        if (FluidSystem::phaseIsActive(FluidSystem::waterPhaseIdx)) {
-                            this->linSys_.duneD_[seg][inlet_upwind][comp_idx][WFrac] += inlet_rate.derivative(WFrac + Indices::numEq);
-                        }
-                        if (FluidSystem::phaseIsActive(FluidSystem::gasPhaseIdx)) {
-                            this->linSys_.duneD_[seg][inlet_upwind][comp_idx][GFrac] += inlet_rate.derivative(GFrac + Indices::numEq);
-                        }
-                        // pressure derivative should be zero
+                        MultisegmentWellAssemble<FluidSystem,Indices,Scalar>(*this).
+                            assembleInflowTerm(seg, inlet, inlet_upwind, comp_idx, inlet_rate, this->linSys_);
                     }
                 }
             }