diff --git a/src/sat/smt/euf_solver.h b/src/sat/smt/euf_solver.h
index 0ab7b5c7061..6c18b87e2d1 100644
--- a/src/sat/smt/euf_solver.h
+++ b/src/sat/smt/euf_solver.h
@@ -178,7 +178,7 @@ namespace euf {
         bool extract_pb(std::function<void(unsigned sz, literal const* c, unsigned k)>& card,
                         std::function<void(unsigned sz, literal const* c, unsigned const* coeffs, unsigned k)>& pb) override;
 
-        bool to_formulas(std::function<expr_ref(sat::literal)>& l2e, expr_ref_vector& fmls);
+        bool to_formulas(std::function<expr_ref(sat::literal)>& l2e, expr_ref_vector& fmls) override;
         sat::literal internalize(expr* e, bool sign, bool root) override;
         void update_model(model_ref& mdl);
        
diff --git a/src/sat/tactic/goal2sat.cpp b/src/sat/tactic/goal2sat.cpp
index 55eb7fa2f80..fbe26d3f918 100644
--- a/src/sat/tactic/goal2sat.cpp
+++ b/src/sat/tactic/goal2sat.cpp
@@ -87,6 +87,8 @@ struct goal2sat::imp : public sat::sat_internalizer {
         m_true = sat::null_literal;
         m_aig = s.get_cut_simplifier();
     }
+
+    ~imp() override {}
         
     void updt_params(params_ref const & p) {
         m_ite_extra  = p.get_bool("ite_extra", true);