diff --git a/egs/librispeech/ASR/local/.compute_fbank_vox.py.swp b/egs/librispeech/ASR/local/.compute_fbank_vox.py.swp
index ec8ff9a7f..ebb1251ab 100644
Binary files a/egs/librispeech/ASR/local/.compute_fbank_vox.py.swp and b/egs/librispeech/ASR/local/.compute_fbank_vox.py.swp differ
diff --git a/egs/librispeech/ASR/local/compute_fbank_vox.py b/egs/librispeech/ASR/local/compute_fbank_vox.py
index 8eff13cd7..f8b5d1e39 100755
--- a/egs/librispeech/ASR/local/compute_fbank_vox.py
+++ b/egs/librispeech/ASR/local/compute_fbank_vox.py
@@ -71,7 +71,7 @@ def get_args():
     return parser.parse_args()
 
 
-def compute_fbank_LJSpeech(bpe_model: Optional[str] = None, args):
+def compute_fbank_LJSpeech(bpe_model: Optional[str] = None, args: Optional = None):
     src_dir = Path("data/manifests")
     output_dir = Path("data/fbank")
     num_jobs = min(15, os.cpu_count())