diff --git a/egs/librispeech/ASR/.prepare_vox.sh.swp b/egs/librispeech/ASR/.prepare_vox.sh.swp
index dd04238df..d2ff12489 100644
Binary files a/egs/librispeech/ASR/.prepare_vox.sh.swp and b/egs/librispeech/ASR/.prepare_vox.sh.swp differ
diff --git a/egs/librispeech/ASR/prepare_vox.sh b/egs/librispeech/ASR/prepare_vox.sh
index 8ca89c907..41eab7a93 100755
--- a/egs/librispeech/ASR/prepare_vox.sh
+++ b/egs/librispeech/ASR/prepare_vox.sh
@@ -201,7 +201,7 @@ if [ $stage -le 7 ] && [ $stop_stage -ge 7 ]; then
 		for dest in "test-clean" "test-other"; do
 			for spk in $dl_dir/$dest/*; do
 				spk_id=${spk#*$dest\/}
-				./local/compute_fbank_vox.py --data-dir $spk --spk-id $spk_id --speed true
+				./local/compute_fbank_vox.py --data-dir $spk --spk-id $spk_id --speed true --prefix $subset
 			done
 		done
     #touch data/fbank/.vox.done