diff --git a/egs/aidatatang_200zh/ASR/local/prepare_char.py b/egs/aidatatang_200zh/ASR/local/prepare_char.py
index d9e47d17a..ffc00cc79 100755
--- a/egs/aidatatang_200zh/ASR/local/prepare_char.py
+++ b/egs/aidatatang_200zh/ASR/local/prepare_char.py
@@ -39,7 +39,7 @@ from typing import Dict, List
 
 import k2
 import torch
-from prepare_lang import (
+from .prepare_lang import (
     Lexicon,
     add_disambig_symbols,
     add_self_loops,