diff --git a/src/f5_tts/train/finetune_gradio.py b/src/f5_tts/train/finetune_gradio.py
index f37fb8603..beb509a83 100644
--- a/src/f5_tts/train/finetune_gradio.py
+++ b/src/f5_tts/train/finetune_gradio.py
@@ -390,7 +390,7 @@ def start_training(
     stream=False,
     logger="wandb",
 ):
-    global training_process, tts_api, stop_signal
+    global training_process, tts_api, stop_signal, pipe
 
     if tts_api is not None or pipe is not None:
         if tts_api is not None: