diff --git a/llmc/data/dataset/base_dataset.py b/llmc/data/dataset/base_dataset.py
index 55c36f84a..7af3de73a 100755
--- a/llmc/data/dataset/base_dataset.py
+++ b/llmc/data/dataset/base_dataset.py
@@ -25,7 +25,7 @@ def __init__(self, tokenizer, calib_cfg, batch_process=None):
         self.load_from_txt = calib_cfg.get('load_from_txt', False)
         self.calib_dataset_path = calib_cfg.get('path', None)
         self.apply_chat_template = calib_cfg.get('apply_chat_template', False)
-        self.n_samples = calib_cfg.get('seq_len', None)
+        self.n_samples = calib_cfg.get('n_samples', None)
         self.calib_bs = calib_cfg['bs']
         if self.calib_dataset_name in ['t2v', 'i2v']:
             assert self.calib_bs == 1