diff --git a/src/smt/theory_lra.cpp b/src/smt/theory_lra.cpp
index 8b5739cb1..f8f448236 100644
--- a/src/smt/theory_lra.cpp
+++ b/src/smt/theory_lra.cpp
@@ -618,7 +618,7 @@ class theory_lra::imp {
                 else if (a.is_idiv(n, n1, n2)) {
                     if (!a.is_numeral(n2, r) || r.is_zero()) found_underspecified(n);
                     m_idiv_terms.push_back(n);
-                    app * mod = a.mk_mod(n1, n2);
+                    app_ref mod(a.mk_mod(n1, n2), m);
                     ctx().internalize(mod, false);
                     if (ctx().relevancy()) ctx().add_relevancy_dependency(n, mod);
                 }