diff --git a/src/math/dd/pdd_interval.h b/src/math/dd/pdd_interval.h
index 9849b3f48..999444b3b 100644
--- a/src/math/dd/pdd_interval.h
+++ b/src/math/dd/pdd_interval.h
@@ -65,7 +65,7 @@ public:
     }
 
     bool separated_from_zero(pdd const& p, u_dependency*& dep) {
-        return m_dep_intervals.check_interval_for_conflict_on_zero((*this)(p), dep);
+        return m_dep_intervals.check_interval_for_conflict_on_zero(get_interval<w_dep::with_deps>(p), dep);
     }
 
 };
diff --git a/src/math/lp/nla_core.cpp b/src/math/lp/nla_core.cpp
index 712704b6d..4b5ca5c06 100644
--- a/src/math/lp/nla_core.cpp
+++ b/src/math/lp/nla_core.cpp
@@ -1282,7 +1282,7 @@ lbool core::inner_check(bool constraint_derived) {
     if (constraint_derived) {
         if (need_to_call_algebraic_methods())
             if (!(m_nla_settings.run_horner() && m_horner.horner_lemmas())) {
-                if (m_nla_settings.run_grobner())
+                if (m_nla_settings.run_grobner() == nla_settings::NEX_GROBNER || m_nla_settings.run_grobner() == nla_settings::BOTH_GROBNER)
                     m_grobner.grobner_lemmas();
             }
         if (done()) {
diff --git a/src/math/lp/nla_params.pyg b/src/math/lp/nla_params.pyg
index a17f44482..21a5ab596 100644
--- a/src/math/lp/nla_params.pyg
+++ b/src/math/lp/nla_params.pyg
@@ -6,7 +6,7 @@ def_module_params('nla',
                    ('horner', BOOL, True, 'run horner\'s heuristic'),
                    ('horner_frequency', UINT, 4, 'horner\'s call frequency'),
                    ('horner_row_length_limit', UINT, 10, 'row is disregarded by the heuristic if its length is longer than the value'),
-                   ('grobner', BOOL, True, 'run grobner\'s heuristic'),
+                   ('grobner', UINT, 1, '1 - grobner nex, 2 - grobner pdd, 3 - both, 0 - none'),
                    ('grobner_frequency', UINT, 5, 'grobner\'s call frequency'),
                    ('grobner_eqs_threshold', UINT, 512, 'grobner\'s maximum number of equalities')
                           ))           
diff --git a/src/math/lp/nla_settings.h b/src/math/lp/nla_settings.h
index 772589a2d..a3e01d4c9 100644
--- a/src/math/lp/nla_settings.h
+++ b/src/math/lp/nla_settings.h
@@ -21,6 +21,10 @@ Revision History:
 #pragma once
 namespace nla {
 class nla_settings {
+public:
+    enum run_grobner_enum {
+                           NO_GROBNER, NEX_GROBNER, PDD_GROBNER, BOTH_GROBNER };
+private:
     bool     m_run_order;
     bool     m_run_tangents;
     bool     m_run_horner;
@@ -28,7 +32,7 @@ class nla_settings {
     unsigned m_horner_frequency;
     unsigned m_horner_row_length_limit;
     // grobner fields
-    bool     m_run_grobner;
+    run_grobner_enum  m_run_grobner;
     unsigned m_grobner_frequency;
     unsigned m_grobner_eqs_threshold;
     unsigned m_grobner_row_length_limit;
@@ -40,7 +44,7 @@ public:
                      m_run_horner(true),
                      m_horner_frequency(4),
                      m_horner_row_length_limit(10),
-                     m_run_grobner(true),
+                     m_run_grobner(NEX_GROBNER),
                      m_grobner_frequency(5),
                      m_grobner_eqs_threshold(512),
                      m_grobner_row_length_limit(10),
@@ -64,8 +68,8 @@ public:
     unsigned horner_row_length_limit() const { return m_horner_row_length_limit; }
     unsigned& horner_row_length_limit() { return m_horner_row_length_limit; }    
 
-    bool run_grobner() const { return m_run_grobner; }
-    bool& run_grobner() { return m_run_grobner; }    
+    run_grobner_enum run_grobner() const { return m_run_grobner; }
+    run_grobner_enum& run_grobner() { return m_run_grobner; }    
 
     unsigned grobner_row_length_limit() const { return m_grobner_row_length_limit; }
     unsigned grobner_expr_size_limit() const { return m_grobner_expr_size_limit; }
diff --git a/src/smt/theory_lra.cpp b/src/smt/theory_lra.cpp
index 89341a7f1..96f7e05ae 100644
--- a/src/smt/theory_lra.cpp
+++ b/src/smt/theory_lra.cpp
@@ -452,7 +452,7 @@ class theory_lra::imp {
             m_nla->get_core()->m_nla_settings.run_horner() = nla.horner();
             m_nla->get_core()->m_nla_settings.horner_frequency() = nla.horner_frequency();
             m_nla->get_core()->m_nla_settings.horner_row_length_limit() = nla.horner_row_length_limit();
-            m_nla->get_core()->m_nla_settings.run_grobner() = nla.grobner();
+            m_nla->get_core()->m_nla_settings.run_grobner() = static_cast<nla::nla_settings::run_grobner_enum>(nla.grobner());
             m_nla->get_core()->m_nla_settings.grobner_eqs_threshold() = nla.grobner_eqs_threshold();
         }
     }