diff --git a/src/solver/simulation/common-hydro-remix.cpp b/src/solver/simulation/common-hydro-remix.cpp
index de8e3f5328..be94eba549 100644
--- a/src/solver/simulation/common-hydro-remix.cpp
+++ b/src/solver/simulation/common-hydro-remix.cpp
@@ -59,7 +59,7 @@ static bool Remix(const Data::AreaList& areas,
 
           auto& D = weeklyResults.ValeursHorairesDeDefaillancePositive;
 
-          auto& S = weeklyResults.ValeursHorairesDeDefaillanceNegative;
+          const auto& S = weeklyResults.ValeursHorairesDeDefaillanceNegative;
 
           auto& H = weeklyResults.TurbinageHoraire;
 
diff --git a/src/solver/simulation/include/antares/solver/simulation/sim_structure_probleme_economique.h b/src/solver/simulation/include/antares/solver/simulation/sim_structure_probleme_economique.h
index aa46e5962d..29dd7c38f5 100644
--- a/src/solver/simulation/include/antares/solver/simulation/sim_structure_probleme_economique.h
+++ b/src/solver/simulation/include/antares/solver/simulation/sim_structure_probleme_economique.h
@@ -333,18 +333,18 @@ class computeTimeStepLevel
     double capacity;
     std::vector<double>& inflows;
     std::vector<double>& ovf;
-    std::vector<double>& turb;
+    const std::vector<double>& turb;
     double pumpRatio;
-    std::vector<double>& pump;
+    const std::vector<double>& pump;
     double excessDown;
 
 public:
     computeTimeStepLevel(const double& startLvl,
                          std::vector<double>& infl,
                          std::vector<double>& overfl,
-                         std::vector<double>& H,
+                         const std::vector<double>& H,
                          double pumpEff,
-                         std::vector<double>& Pump,
+                         const std::vector<double>& Pump,
                          double rc):
         step(0),
         level(startLvl),