diff --git a/paddlespeech/server/engine/tts/online/onnx/tts_engine.py b/paddlespeech/server/engine/tts/online/onnx/tts_engine.py
index 14204dde7..fb903001c 100644
--- a/paddlespeech/server/engine/tts/online/onnx/tts_engine.py
+++ b/paddlespeech/server/engine/tts/online/onnx/tts_engine.py
@@ -77,7 +77,7 @@ class TTSServerExecutor(TTSExecutor):
                 )
                 self.am_res_path = self.task_resource.res_dir
                 self.am_ckpt = os.path.join(
-                    self.am_res_path, self.task_resource.res_dict['ckpt'][0])
+                    self.am_res_path, self.task_resource.res_dict['ckpt'])
                 # must have phones_dict in acoustic
                 self.phones_dict = os.path.join(
                     self.am_res_path,