diff --git a/src/solver/hydro/monthly/h2o_m_construire_les_variables.cpp b/src/solver/hydro/monthly/h2o_m_construire_les_variables.cpp
index aeb3ad1726..534e8c236e 100644
--- a/src/solver/hydro/monthly/h2o_m_construire_les_variables.cpp
+++ b/src/solver/hydro/monthly/h2o_m_construire_les_variables.cpp
@@ -46,15 +46,7 @@ void H2O_M_ConstruireLesVariables(DONNEES_ANNUELLES& DonneesAnnuelles)
     const int NbPdt = DonneesAnnuelles.NombreDePasDeTemps;
     int Var = 0;
 
-    CorrespondanceDesVariables.NumeroDeVariableVolume[0] = Var;
-    ProblemeLineairePartieVariable.Xmin[Var] = 0.0;
-    ProblemeLineairePartieVariable.Xmax[Var] = 1.0;
-    ProblemeLineairePartieFixe.TypeDeVariable[Var] = VARIABLE_BORNEE_DES_DEUX_COTES;
-    ProblemeLineairePartieVariable.AdresseOuPlacerLaValeurDesVariablesOptimisees[Var]
-      = &(DonneesAnnuelles.Volume[0]);
-    Var++;
-
-    for (int Pdt = 1; Pdt < NbPdt; Pdt++)
+    for (int Pdt = 0; Pdt < NbPdt; Pdt++)
     {
         CorrespondanceDesVariables.NumeroDeVariableVolume[Pdt] = Var;
         ProblemeLineairePartieVariable.Xmin[Var] = 0.0;