diff --git a/src/nlsat/nlsat_evaluator.cpp b/src/nlsat/nlsat_evaluator.cpp
index 1d55db9cb..f95a80b56 100644
--- a/src/nlsat/nlsat_evaluator.cpp
+++ b/src/nlsat/nlsat_evaluator.cpp
@@ -593,7 +593,8 @@ namespace nlsat {
             return result;
         }
 
-        interval_set_ref infeasible_intervals(root_atom * a, bool neg, clause const* cls) {
+        interval_set_ref infeasible_intervals(root_atom * a, bool is_int, bool neg, clause const* cls) {
+            (void) is_int;
             atom::kind k = a->get_kind();
             unsigned i = a->i();
             SASSERT(i > 0);
@@ -664,8 +665,8 @@ namespace nlsat {
             return result;
         }
         
-        interval_set_ref infeasible_intervals(atom * a, bool neg, clause const* cls) {
-            return a->is_ineq_atom() ? infeasible_intervals(to_ineq_atom(a), neg, cls) : infeasible_intervals(to_root_atom(a), neg, cls); 
+        interval_set_ref infeasible_intervals(atom * a, bool is_int, bool neg, clause const* cls) {
+            return a->is_ineq_atom() ? infeasible_intervals(to_ineq_atom(a), is_int, neg, cls) : infeasible_intervals(to_root_atom(a), is_int, neg, cls); 
         }
     };
     
diff --git a/src/nlsat/nlsat_explain.cpp b/src/nlsat/nlsat_explain.cpp
index 0b76a14ef..ef5745fe4 100644
--- a/src/nlsat/nlsat_explain.cpp
+++ b/src/nlsat/nlsat_explain.cpp
@@ -1439,7 +1439,7 @@ namespace nlsat {
                 literal l = core[i];
                 atom * a  = m_atoms[l.var()];
                 SASSERT(a != 0);
-                interval_set_ref inf = m_evaluator.infeasible_intervals(a, l.sign(), nullptr);
+                interval_set_ref inf = m_evaluator.infeasible_intervals(a, m_solver.is_int(a->max_var()), l.sign(), nullptr);
                 r = ism.mk_union(inf, r);
                 if (ism.is_full(r)) {
                     // Done
@@ -1458,7 +1458,7 @@ namespace nlsat {
                 literal l = todo[i];
                 atom * a  = m_atoms[l.var()];
                 SASSERT(a != 0);
-                interval_set_ref inf = m_evaluator.infeasible_intervals(a, l.sign(), nullptr);
+                interval_set_ref inf = m_evaluator.infeasible_intervals(a, m_solver.is_int(a->max_var()), l.sign(), nullptr);
                 r = ism.mk_union(inf, r);
                 if (ism.is_full(r)) {
                     // literal l must be in the core