diff --git a/qiskit/transpiler/synthesis/aqc/__init__.py b/qiskit/transpiler/synthesis/aqc/__init__.py
index 7c97a9068c4a..f49b048f9aa6 100644
--- a/qiskit/transpiler/synthesis/aqc/__init__.py
+++ b/qiskit/transpiler/synthesis/aqc/__init__.py
@@ -24,7 +24,10 @@
 from qiskit.synthesis.unitary.aqc import AQC
 from qiskit.synthesis.unitary.aqc.cnot_structures import make_cnot_network
 from qiskit.synthesis.unitary.aqc.cnot_unit_circuit import CNOTUnitCircuit
-from qiskit.synthesis.unitary.aqc.cnot_unit_objective import CNOTUnitObjective, DefaultCNOTUnitObjective
+from qiskit.synthesis.unitary.aqc.cnot_unit_objective import (
+    CNOTUnitObjective,
+    DefaultCNOTUnitObjective,
+)
 from qiskit.synthesis.unitary.aqc.fast_gradient.fast_gradient import FastCNOTUnitObjective
 from qiskit.transpiler.passes.synthesis.aqc_plugin import AQCSynthesisPlugin