diff --git a/egs/timit/ASR/local/compile_hlg.py b/egs/timit/ASR/local/compile_hlg.py
old mode 100644
new mode 100755
diff --git a/egs/timit/ASR/local/compute_fbank_timit.py b/egs/timit/ASR/local/compute_fbank_timit.py
old mode 100644
new mode 100755
diff --git a/egs/timit/ASR/local/prepare_lang.py b/egs/timit/ASR/local/prepare_lang.py
old mode 100644
new mode 100755
diff --git a/egs/timit/ASR/local/prepare_lexicon.py b/egs/timit/ASR/local/prepare_lexicon.py
old mode 100644
new mode 100755
diff --git a/egs/timit/ASR/prepare.sh b/egs/timit/ASR/prepare.sh
index 148a9f51b..f25fe5add 100644
--- a/egs/timit/ASR/prepare.sh
+++ b/egs/timit/ASR/prepare.sh
@@ -59,7 +59,9 @@ if [ $stage -le -1 ] && [ $stop_stage -ge -1 ]; then
   # using: `sudo apt-get install git-lfs && git-lfs install`
   [ ! -e $dl_dir/lm ] && mkdir -p $dl_dir/lm
   git clone https://huggingface.co/luomingshuang/timit_lm $dl_dir/lm
-  cd $dl_dir/lm && git lfs pull
+  pushd $dl_dir/lm
+  git lfs pull
+  popd
 fi
 
 if [ $stage -le 0 ] && [ $stop_stage -ge 0 ]; then