diff --git a/src/libs/antares/study/binding_constraint/BindingConstraint.cpp b/src/libs/antares/study/binding_constraint/BindingConstraint.cpp
index f2e49b3c2f..f1728d7d2d 100644
--- a/src/libs/antares/study/binding_constraint/BindingConstraint.cpp
+++ b/src/libs/antares/study/binding_constraint/BindingConstraint.cpp
@@ -160,7 +160,7 @@ void BindingConstraint::weight(const AreaLink* lnk, double w)
 
 void BindingConstraint::weight(const ThermalCluster* cluster, double w)
 {
-    if (cluster && cluster->isActive())
+    if (cluster)
     {
         if (Math::Zero(w))
         {
@@ -196,7 +196,7 @@ void BindingConstraint::offset(const AreaLink* lnk, int o)
 
 void BindingConstraint::offset(const ThermalCluster* cluster, int o)
 {
-    if (cluster && cluster->isActive())
+    if (cluster)
     {
         if (Math::Zero(o))
         {
diff --git a/src/libs/antares/study/binding_constraint/BindingConstraint.hxx b/src/libs/antares/study/binding_constraint/BindingConstraint.hxx
index 1ef768b074..21edd984e6 100644
--- a/src/libs/antares/study/binding_constraint/BindingConstraint.hxx
+++ b/src/libs/antares/study/binding_constraint/BindingConstraint.hxx
@@ -55,7 +55,10 @@ inline uint BindingConstraint::linkCount() const
 
 inline uint BindingConstraint::clusterCount() const
 {
-    return (uint)pClusterWeights.size();
+    return std::ranges::count_if(pClusterWeights,
+                                 [](const std::pair<const Data::ThermalCluster*, double>& coeff)
+                                 { return coeff.first->isActive(); });
+
 }
 
 inline bool BindingConstraint::enabled() const