diff --git a/src/sat/sat_solver.cpp b/src/sat/sat_solver.cpp
index c484808ec..2e2accfa0 100644
--- a/src/sat/sat_solver.cpp
+++ b/src/sat/sat_solver.cpp
@@ -36,7 +36,6 @@ Revision History:
 
 #define ENABLE_TERNARY true
 
-
 namespace sat {
 
 
@@ -622,6 +621,7 @@ namespace sat {
     }
 
     void solver::defrag_clauses() {
+        m_defrag_threshold = 2;
         if (memory_pressure()) return;
         pop(scope_lvl());
         IF_VERBOSE(2, verbose_stream() << "(sat-defrag)\n");
diff --git a/src/tactic/smtlogics/qfbv_tactic.cpp b/src/tactic/smtlogics/qfbv_tactic.cpp
index 11d05cde6..cd1cb7dec 100644
--- a/src/tactic/smtlogics/qfbv_tactic.cpp
+++ b/src/tactic/smtlogics/qfbv_tactic.cpp
@@ -21,12 +21,12 @@ Notes:
 #include "tactic/core/propagate_values_tactic.h"
 #include "tactic/core/solve_eqs_tactic.h"
 #include "tactic/core/elim_uncnstr_tactic.h"
-#include "smt/tactic/smt_tactic.h"
 #include "tactic/bv/bit_blaster_tactic.h"
 #include "tactic/bv/bv1_blaster_tactic.h"
 #include "tactic/bv/max_bv_sharing_tactic.h"
 #include "tactic/bv/bv_size_reduction_tactic.h"
 #include "tactic/aig/aig_tactic.h"
+#include "smt/tactic/smt_tactic.h"
 #include "sat/tactic/sat_tactic.h"
 #include "sat/sat_solver/inc_sat_solver.h"
 #include "ackermannization/ackermannize_bv_tactic.h"
@@ -60,6 +60,7 @@ static tactic * mk_qfbv_preamble(ast_manager& m, params_ref const& p) {
             mk_elim_uncnstr_tactic(m),
             if_no_proofs(if_no_unsat_cores(mk_bv_size_reduction_tactic(m))),
             using_params(mk_simplify_tactic(m), simp2_p),
+
             //
             // Z3 can solve a couple of extra benchmarks by using hoist_mul
             // but the timeout in SMT-COMP is too small.