diff --git a/tools/make_parquet_list.py b/tools/make_parquet_list.py
index 29f42cc..2f35ae6 100755
--- a/tools/make_parquet_list.py
+++ b/tools/make_parquet_list.py
@@ -86,7 +86,7 @@ if __name__ == "__main__":
                         help='Use Direct Preference Optimization')
     args = parser.parse_args()
 
-    utt2wav, utt2text, utt2spk = {}, {}, {}
+    utt2wav, utt2text, utt2spk, utt2instruct = {}, {}, {}, {}
     with open('{}/wav.scp'.format(args.src_dir)) as f:
         for l in f:
             l = l.replace('\n', '').split()