diff --git a/PEPit/function.py b/PEPit/function.py
index fd555b70..24445fb8 100644
--- a/PEPit/function.py
+++ b/PEPit/function.py
@@ -418,7 +418,7 @@ def add_constraints_from_two_lists_of_points(self, list_of_points_1, list_of_poi
                 if xj_id is None:
                     xj_id = "Point_{}".format(j)
 
-                if i == j or (i > j and symmetry):
+                if point_i == point_j or (i > j and symmetry):
                     row_of_constraints.append(0)
 
                 else: