diff --git a/src/qutip_qip/circuit/circuitsimulator.py b/src/qutip_qip/circuit/circuitsimulator.py
index 1d9775da..1e73d343 100644
--- a/src/qutip_qip/circuit/circuitsimulator.py
+++ b/src/qutip_qip/circuit/circuitsimulator.py
@@ -474,9 +474,7 @@ def _check_classical_control_value(operation, cbits):
             state = self._apply_measurement(op, current_state)
         elif isinstance(op, Gate):
             if op.classical_controls is not None:
-                apply_gate = _check_classical_control_value(
-                    op, self.cbits
-                )
+                apply_gate = _check_classical_control_value(op, self.cbits)
             else:
                 apply_gate = True
             if not apply_gate: