diff --git a/power_grid_model_c/power_grid_model/include/power_grid_model/math_solver/sparse_lu_solver.hpp b/power_grid_model_c/power_grid_model/include/power_grid_model/math_solver/sparse_lu_solver.hpp
index 1e9055b8c..00acf333a 100644
--- a/power_grid_model_c/power_grid_model/include/power_grid_model/math_solver/sparse_lu_solver.hpp
+++ b/power_grid_model_c/power_grid_model/include/power_grid_model/math_solver/sparse_lu_solver.hpp
@@ -534,7 +534,7 @@ template <class Tensor, class RHSVector, class XVector> class SparseLUSolver {
     }
 
     void reset_matrix_cache() {
-        // has_pivot_perturbation_ is already false
+        has_pivot_perturbation_ = false;
         matrix_norm_ = 0.0;
         original_matrix_.reset();
     }