diff --git a/pyomo/contrib/mindtpy/util.py b/pyomo/contrib/mindtpy/util.py
index 87972de1d69..a899cab5fd1 100644
--- a/pyomo/contrib/mindtpy/util.py
+++ b/pyomo/contrib/mindtpy/util.py
@@ -37,6 +37,7 @@
 from pyomo.solvers.plugins.solvers.gurobi_direct import gurobipy
 from pyomo.solvers.plugins.solvers.gurobi_persistent import GurobiPersistent
 import math
+from itertools import permutations, product
 
 pyomo_nlp = attempt_import('pyomo.contrib.pynumero.interfaces.pyomo_nlp')[0]
 numpy = attempt_import('numpy')[0]