diff --git a/src/util/lp/lp_primal_simplex_instances.cpp b/src/util/lp/lp_primal_simplex_instances.cpp
index b725732c8..470eeb29d 100644
--- a/src/util/lp/lp_primal_simplex_instances.cpp
+++ b/src/util/lp/lp_primal_simplex_instances.cpp
@@ -13,8 +13,10 @@
 template bool lean::lp_primal_simplex<double, double>::bounds_hold(std::unordered_map<std::string, double, std::hash<std::string>, std::equal_to<std::string>, std::allocator<std::pair<std::string const, double> > > const&);
 template bool lean::lp_primal_simplex<double, double>::row_constraints_hold(std::unordered_map<std::string, double, std::hash<std::string>, std::equal_to<std::string>, std::allocator<std::pair<std::string const, double> > > const&);
 template double lean::lp_primal_simplex<double, double>::get_current_cost() const;
+template double lean::lp_primal_simplex<double, double>::get_column_value(unsigned int) const;
 template lean::lp_primal_simplex<double, double>::~lp_primal_simplex();
 template lean::lp_primal_simplex<lean::mpq, lean::mpq>::~lp_primal_simplex();
 template lean::mpq lean::lp_primal_simplex<lean::mpq, lean::mpq>::get_current_cost() const;
+template lean::mpq lean::lp_primal_simplex<lean::mpq, lean::mpq>::get_column_value(unsigned int) const;
 template void lean::lp_primal_simplex<double, double>::find_maximal_solution();
 template void lean::lp_primal_simplex<lean::mpq, lean::mpq>::find_maximal_solution();
diff --git a/src/util/lp/lp_solver_instances.cpp b/src/util/lp/lp_solver_instances.cpp
index 42ddb9e4c..abed0d3c1 100644
--- a/src/util/lp/lp_solver_instances.cpp
+++ b/src/util/lp/lp_solver_instances.cpp
@@ -31,6 +31,7 @@ template void lean::lp_solver<lean::mpq, lean::mpq>::fill_m_b();
 template void lean::lp_solver<lean::mpq, lean::mpq>::fill_matrix_A_and_init_right_side();
 template void lean::lp_solver<lean::mpq, lean::mpq>::flip_costs();
 template lean::mpq lean::lp_solver<lean::mpq, lean::mpq>::get_column_cost_value(unsigned int, lean::column_info<lean::mpq>*) const;
+template int lean::lp_solver<lean::mpq, lean::mpq>::get_column_index_by_name(std::string) const;
 template lean::mpq lean::lp_solver<lean::mpq, lean::mpq>::get_column_value_by_name(std::string) const;
 template lean::mpq lean::lp_solver<lean::mpq, lean::mpq>::get_column_value_with_core_solver(unsigned int, lean::lp_core_solver_base<lean::mpq, lean::mpq>*) const;
 template lean::column_info<lean::mpq>* lean::lp_solver<lean::mpq, lean::mpq>::get_or_create_column_info(unsigned int);