diff --git a/nni/algorithms/compression/pytorch/quantization/quantizers.py b/nni/algorithms/compression/pytorch/quantization/quantizers.py
index 137516c49b..daf60a1251 100644
--- a/nni/algorithms/compression/pytorch/quantization/quantizers.py
+++ b/nni/algorithms/compression/pytorch/quantization/quantizers.py
@@ -341,8 +341,8 @@ def export_model(self, model_path, calibration_path=None, onnx_path=None, input_
                 if hasattr(module, BN_FOLD_TAG):
                     actual_weight = getattr(module, 'old_weight', None)
                     if actual_weight is None:
-                        logger.warning("Can not recover weight for layer {}. "
-                                       "This may lead to a wrong accuracy performance on the backend.".format(name))
+                        logger.warning("Can not recover weight for layer %s. "
+                                       "This may lead to a wrong accuracy performance on the backend.", name)
                     delattr(module, 'weight')
                     module.register_parameter('weight', actual_weight)