diff --git a/examples/industrial_data_pretraining/lcbnet/demo2.sh b/examples/industrial_data_pretraining/lcbnet/demo2.sh
index 10ba5aed8..a5afa9c7d 100755
--- a/examples/industrial_data_pretraining/lcbnet/demo2.sh
+++ b/examples/industrial_data_pretraining/lcbnet/demo2.sh
@@ -1,4 +1,4 @@
-file_dir=./exp/speech_lcbnet_contextual_asr-en-16k-bpe-vocab5002-pytorch
+file_dir="./exp/speech_lcbnet_contextual_asr-en-16k-bpe-vocab5002-pytorch"
 
 
 python -m funasr.bin.inference \