diff --git a/tools/webui.py b/tools/webui.py
index ef6ae650..c2685f67 100644
--- a/tools/webui.py
+++ b/tools/webui.py
@@ -23,7 +23,7 @@
 from fish_speech.text.chn_text_norm.text import Text as ChnNormedText
 from fish_speech.utils import autocast_exclude_mps, set_seed
 from tools.api import decode_vq_tokens, encode_reference
-from tools.file import AUDIO_EXTENSIONS, list_files
+from tools.file import AUDIO_EXTENSIONS, audio_to_bytes, list_files, read_ref_text
 from tools.llama.generate import (
     GenerateRequest,
     GenerateResponse,
@@ -87,6 +87,7 @@ def build_html_error_message(error):
 def inference(req: ServeTTSRequest):
 
     idstr: str | None = req.reference_id
+    prompt_tokens, prompt_texts = [], []
     if idstr is not None:
         ref_folder = Path("references") / idstr
         ref_folder.mkdir(parents=True, exist_ok=True)