diff --git a/egs/commonvoice/ASR/zipformer/train_char.py b/egs/commonvoice/ASR/zipformer/train_char.py
index 179a0651a..31af7ef8c 100644
--- a/egs/commonvoice/ASR/zipformer/train_char.py
+++ b/egs/commonvoice/ASR/zipformer/train_char.py
@@ -97,6 +97,7 @@ from icefall.utils import (
     get_parameter_groups_with_lrs,
     setup_logger,
     str2bool,
+    tokenize_by_CJK_char,
 )
 
 LRSchedulerType = Union[torch.optim.lr_scheduler._LRScheduler, optim.LRScheduler]
@@ -356,7 +357,7 @@ def compute_loss(
     batch_idx_train = params.batch_idx_train
     warm_step = params.warm_step
 
-    texts = batch["supervisions"]["text"]
+    texts = [tokenize_by_CJK_char(text) for text in batch["supervisions"]["text"]]
     y = graph_compiler.texts_to_ids(texts)
     y = k2.RaggedTensor(y).to(device)