diff --git a/opm/simulators/wells/StandardWell_impl.hpp b/opm/simulators/wells/StandardWell_impl.hpp
index 1e1e3cfce..1f46b71cc 100644
--- a/opm/simulators/wells/StandardWell_impl.hpp
+++ b/opm/simulators/wells/StandardWell_impl.hpp
@@ -844,7 +844,8 @@ namespace Opm
                 cq_s_sm *= extendEval(intQuants.fluidState().saltConcentration());
             }
             // Note. Efficiency factor is handled in the output layer
-            well_state.perfRateBrine()[first_perf_ + perf] = cq_s_sm.value();
+            auto * perf_rate_brine = &well_state.perfRateBrine()[this->first_perf_];
+            perf_rate_brine[perf] = cq_s_sm.value();
 
             cq_s_sm *= well_efficiency_factor_;
             connectionRates[perf][contiBrineEqIdx] = Base::restrictEval(cq_s_sm);
diff --git a/opm/simulators/wells/WellState.cpp b/opm/simulators/wells/WellState.cpp
index ab348c948..452de91da 100644
--- a/opm/simulators/wells/WellState.cpp
+++ b/opm/simulators/wells/WellState.cpp
@@ -792,7 +792,8 @@ void WellState::reportConnections(data::Well& well,
             comp.rates.set( rt::polymer, perf_polymer_rate[local_comp_index]);
         }
         if ( pu.has_brine ) {
-            comp.rates.set( rt::brine, this->perfRateBrine()[wt.second[1] + local_comp_index]);
+            const auto * perf_brine_rate = &this->perfRateBrine()[wt.second[1]];
+            comp.rates.set( rt::brine, perf_brine_rate[local_comp_index]);
         }
         if ( pu.has_solvent ) {
             const auto * perf_solvent_rate = &this->perfRateSolvent()[wt.second[1]];
@@ -1024,8 +1025,8 @@ double WellState::polymerWellRate(const int w) const
 
 double WellState::brineWellRate(const int w) const
 {
-    return parallel_well_info_[w]->sumPerfValues(&perfRateBrine_[0] + first_perf_index_[w],
-                                                 &perfRateBrine_[0] + first_perf_index_[w] + num_perf_[w]);
+    const auto * perf_rates_brine = &perfRateBrine_[first_perf_index_[w]];
+    return parallel_well_info_[w]->sumPerfValues(perf_rates_brine, perf_rates_brine + this->num_perf_[w]);
 }
 
 int WellState::topSegmentIndex(const int w) const