diff --git a/pyomo/contrib/gdpopt/branch_and_bound.py b/pyomo/contrib/gdpopt/branch_and_bound.py
index 26dc2b5f2eb..645e3564a88 100644
--- a/pyomo/contrib/gdpopt/branch_and_bound.py
+++ b/pyomo/contrib/gdpopt/branch_and_bound.py
@@ -230,12 +230,12 @@ def _solve_gdp(self, model, config):
                 no_feasible_soln = float('inf')
                 self.LB = (
                     node_data.obj_lb
-                    if solve_data.objective_sense == minimize
+                    if self.objective_sense == minimize
                     else -no_feasible_soln
                 )
                 self.UB = (
                     no_feasible_soln
-                    if solve_data.objective_sense == minimize
+                    if self.objective_sense == minimize
                     else -node_data.obj_lb
                 )
                 config.logger.info(