diff --git a/src/libs/antares/study/parts/thermal/cluster.cpp b/src/libs/antares/study/parts/thermal/cluster.cpp
index 85abd8090a..0792041ebe 100644
--- a/src/libs/antares/study/parts/thermal/cluster.cpp
+++ b/src/libs/antares/study/parts/thermal/cluster.cpp
@@ -401,6 +401,9 @@ double Data::ThermalCluster::computeMarketBidCost(double fuelCost,
 
 void Data::ThermalCluster::reverseCalculationOfSpinning()
 {
+    if (tsGenBehavior == LocalTSGenerationBehavior::forceNoGen)
+        return;
+
     // Nothing to do if the spinning is equal to zero
     // because it will the same multiply all entries of the matrix by 1.
     if (Utils::isZero(spinning))