diff --git a/funasr/build_utils/build_asr_model.py b/funasr/build_utils/build_asr_model.py
index e5bed1d64..621c4d960 100644
--- a/funasr/build_utils/build_asr_model.py
+++ b/funasr/build_utils/build_asr_model.py
@@ -6,6 +6,7 @@ from funasr.models.ctc import CTC
 from funasr.models.decoder.abs_decoder import AbsDecoder
 from funasr.models.decoder.contextual_decoder import ContextualParaformerDecoder
 from funasr.models.decoder.rnn_decoder import RNNDecoder
+from funasr.models.decoder.rnnt_decoder import RNNTDecoder
 from funasr.models.decoder.sanm_decoder import ParaformerSANMDecoder, FsmnDecoderSCAMAOpt
 from funasr.models.decoder.transformer_decoder import (
     DynamicConvolution2DTransformerDecoder,  # noqa: H301
@@ -19,14 +20,13 @@ from funasr.models.decoder.transformer_decoder import (
 )
 from funasr.models.decoder.transformer_decoder import ParaformerDecoderSAN
 from funasr.models.decoder.transformer_decoder import TransformerDecoder
-from funasr.models.decoder.rnnt_decoder import RNNTDecoder
-from funasr.models.joint_net.joint_network import JointNetwork
 from funasr.models.e2e_asr import ASRModel
 from funasr.models.e2e_asr_mfcca import MFCCA
-from funasr.models.e2e_asr_paraformer import Paraformer, ParaformerOnline, ParaformerBert, BiCifParaformer, ContextualParaformer
+from funasr.models.e2e_asr_paraformer import Paraformer, ParaformerOnline, ParaformerBert, BiCifParaformer, \
+    ContextualParaformer
+from funasr.models.e2e_asr_transducer import TransducerModel, UnifiedTransducerModel
 from funasr.models.e2e_tp import TimestampPredictor
 from funasr.models.e2e_uni_asr import UniASR
-from funasr.models.e2e_asr_transducer import TransducerModel, UnifiedTransducerModel
 from funasr.models.encoder.conformer_encoder import ConformerEncoder, ConformerChunkEncoder
 from funasr.models.encoder.data2vec_encoder import Data2VecEncoder
 from funasr.models.encoder.mfcca_encoder import MFCCAEncoder
@@ -39,6 +39,7 @@ from funasr.models.frontend.fused import FusedFrontends
 from funasr.models.frontend.s3prl import S3prlFrontend
 from funasr.models.frontend.wav_frontend import WavFrontend
 from funasr.models.frontend.windowing import SlidingWindow
+from funasr.models.joint_net.joint_network import JointNetwork
 from funasr.models.predictor.cif import CifPredictor, CifPredictorV2, CifPredictorV3
 from funasr.models.specaug.specaug import SpecAug
 from funasr.models.specaug.specaug import SpecAugLFR
@@ -252,7 +253,7 @@ def build_asr_model(args):
         args.frontend = None
         args.frontend_conf = {}
         frontend = None
-        input_size = args.input_size
+        input_size = args.input_size if hasattr(args, "input_size") else None
 
     # data augmentation for spectrogram
     if args.specaug is not None:
@@ -298,7 +299,8 @@ def build_asr_model(args):
             token_list=token_list,
             **args.model_conf,
         )
-    elif args.model in ["paraformer", "paraformer_online", "paraformer_bert", "bicif_paraformer", "contextual_paraformer"]:
+    elif args.model in ["paraformer", "paraformer_online", "paraformer_bert", "bicif_paraformer",
+                        "contextual_paraformer"]:
         # predictor
         predictor_class = predictor_choices.get_class(args.predictor)
         predictor = predictor_class(**args.predictor_conf)