diff --git a/src/solver/simulation/include/antares/solver/simulation/solver_utils.h b/src/solver/simulation/include/antares/solver/simulation/solver_utils.h
index 1e7ee2ffb8..f7129c6a35 100644
--- a/src/solver/simulation/include/antares/solver/simulation/solver_utils.h
+++ b/src/solver/simulation/include/antares/solver/simulation/solver_utils.h
@@ -138,7 +138,7 @@ class yearRandomNumbers
         // Thermal noises
         for (uint a = 0; a != pNbAreas; a++)
         {
-            pThermalNoisesByArea[a].assign(pNbClustersByArea[a], 0);
+            pThermalNoisesByArea[a].assign(pThermalNoisesByArea[a].size(), 0);
         }
 
         // General