diff --git a/uno/linear_algebra/SymmetricIndefiniteLinearSystem.hpp b/uno/linear_algebra/SymmetricIndefiniteLinearSystem.hpp
index ff93243c..131ffc52 100644
--- a/uno/linear_algebra/SymmetricIndefiniteLinearSystem.hpp
+++ b/uno/linear_algebra/SymmetricIndefiniteLinearSystem.hpp
@@ -91,7 +91,7 @@ namespace uno {
    template <typename ElementType>
    void SymmetricIndefiniteLinearSystem<ElementType>::factorize_matrix(DirectSymmetricIndefiniteLinearSolver<size_t, ElementType>& linear_solver,
          const WarmstartInformation& warmstart_information) {
-      if (true) {
+      if (warmstart_information.problem_structure_changed) {
          DEBUG << "Performing symbolic factorization of the indefinite system\n";
          linear_solver.do_symbolic_factorization(this->matrix);
       }