diff --git a/src/math/lp/hnf_cutter.cpp b/src/math/lp/hnf_cutter.cpp
index 687a5517c..71e888d39 100644
--- a/src/math/lp/hnf_cutter.cpp
+++ b/src/math/lp/hnf_cutter.cpp
@@ -50,8 +50,7 @@ namespace lp  {
         m_constraints_for_explanation.push_back(ci);
        
         for (const auto &p : *t) {
-            auto tv = lia.lra.column2tv(p.column());
-            m_var_register.add_var(tv.id(), true); // hnf only deals with integral variables for now
+            m_var_register.add_var(p.column().index(), true); // hnf only deals with integral variables for now
             mpq t = abs(ceil(p.coeff()));
             if (t > m_abs_max)
                 m_abs_max = t;
diff --git a/src/test/lp/gomory_test.h b/src/test/lp/gomory_test.h
index f7dc52b05..16d33794e 100644
--- a/src/test/lp/gomory_test.h
+++ b/src/test/lp/gomory_test.h
@@ -187,7 +187,7 @@ struct gomory_test {
     void print_term(lar_term & t, std::ostream & out) {
         vector<std::pair<mpq, unsigned>>  row;
         for (auto p : t)
-            row.push_back(std::make_pair(p.coeff(), p.var().index()));
+            row.push_back(std::make_pair(p.coeff(), p.column().index()));
         print_row(out, row);
     }