diff --git a/src/ComputingTasks.cc b/src/ComputingTasks.cc
index 48bdd0233516e0a6f54490fc3c698e81046065ec..bd12f523bbd1fb94789ef698cfa9685c14b729c0 100644
--- a/src/ComputingTasks.cc
+++ b/src/ComputingTasks.cc
@@ -2214,7 +2214,11 @@ PlannerObjectiveStatement::writeOutput(ostream &output, const string &basename,
   output << "M_.NNZDerivatives_objective = [";
   for (int i=1; i < static_cast<int>(model_tree.getNNZDerivatives().size()); i++)
     output << (i > model_tree.getComputedDerivsOrder() ? -1 : model_tree.getNNZDerivatives()[i]) << ";";
-  output << "];";
+  output << "];" << endl;
+  output << "M_.objective_tmp_nbr = [";
+  for (const auto &temporary_terms_derivative : model_tree.getTemporaryTermsDerivatives())
+    output << temporary_terms_derivative.size() << "; ";
+  output << "];" << endl;
   model_tree.writeStaticFile(basename + ".objective", false, false, false, "", {}, {}, false);
 }
 
diff --git a/src/ModelTree.hh b/src/ModelTree.hh
index 0014c34aadcb0415c7c3887f06be80e1fa5ab576..467c0c942345d0c31011ddc61e1dc6c140eeb855 100644
--- a/src/ModelTree.hh
+++ b/src/ModelTree.hh
@@ -462,6 +462,13 @@ public:
     return NNZDerivatives;
   }
 
+  //! Returns the vector of temporary terms derivatives
+  inline const vector<temporary_terms_t> &
+  getTemporaryTermsDerivatives() const
+  {
+    return temporary_terms_derivatives;
+  }
+
   //!Returns the maximum order of computed derivatives
   inline int
   getComputedDerivsOrder() const