diff --git a/src/util/lp/lar_term.h b/src/util/lp/lar_term.h
index 7ce1e3f88..53c5f2b16 100644
--- a/src/util/lp/lar_term.h
+++ b/src/util/lp/lar_term.h
@@ -20,12 +20,10 @@
 #pragma once
 #include "util/lp/indexed_vector.h"
 #include "util/map.h"
-
 namespace lp {
 class lar_term {
     // the term evaluates to sum of m_coeffs 
     u_map<mpq> m_coeffs;
-    // mpq m_v;
 public:
     lar_term() {}
     void add_monomial(const mpq& c, unsigned j) {
@@ -40,6 +38,11 @@ public:
                 m_coeffs.erase(j);
         }
     }
+    
+    void add_var(unsigned j) {
+        rational c(1);
+        add_monomial(c, j);
+    }
 
     bool is_empty() const {
         return m_coeffs.empty(); // && is_zero(m_v);