diff --git a/src/ast/euf/euf_ac_plugin.cpp b/src/ast/euf/euf_ac_plugin.cpp
index ce0817e00..5e8ec997f 100644
--- a/src/ast/euf/euf_ac_plugin.cpp
+++ b/src/ast/euf/euf_ac_plugin.cpp
@@ -80,7 +80,7 @@ namespace euf {
     }
 
     ac_plugin::ac_plugin(egraph& g, func_decl* f) :
-        plugin(g), m_decl(f), m_fid(f->get_family_id()),
+        plugin(g), m_fid(f->get_family_id()), m_decl(f),
         m_dep_manager(get_region()),
         m_hash(*this), m_eq(*this), m_monomial_table(m_hash, m_eq)
     {
diff --git a/src/smt/params/smt_params_helper.pyg b/src/smt/params/smt_params_helper.pyg
index f2e08aaf5..c4660d1ea 100644
--- a/src/smt/params/smt_params_helper.pyg
+++ b/src/smt/params/smt_params_helper.pyg
@@ -95,6 +95,7 @@ def_module_params(module_name='smt',
                           ('arith.rep_freq', UINT, 0, 'the report frequency, in how many iterations print the cost and other info'),
                           ('arith.min', BOOL, False, 'minimize cost'),
                           ('arith.print_stats', BOOL, False, 'print statistic'),
+			  ('arith.validate', BOOL, False, 'validate lemmas generated by arithmetic solver'),
                           ('arith.simplex_strategy', UINT, 0, 'simplex strategy for the solver'),
                           ('arith.enable_hnf', BOOL, True, 'enable hnf (Hermite Normal Form) cuts'),
                           ('arith.bprop_on_pivoted_rows', BOOL, True, 'propagate bounds on rows changed by the pivot operation'),