diff --git a/GPT_SoVITS/text/g2pw/onnx_api.py b/GPT_SoVITS/text/g2pw/onnx_api.py
index a9b596b5..05681700 100644
--- a/GPT_SoVITS/text/g2pw/onnx_api.py
+++ b/GPT_SoVITS/text/g2pw/onnx_api.py
@@ -90,7 +90,7 @@ class G2PWOnnxConverter:
         sess_options = onnxruntime.SessionOptions()
         sess_options.graph_optimization_level = onnxruntime.GraphOptimizationLevel.ORT_ENABLE_ALL
         sess_options.execution_mode = onnxruntime.ExecutionMode.ORT_SEQUENTIAL
-        sess_options.intra_op_num_threads = 2
+        sess_options.intra_op_num_threads = 2 if torch.cuda.is_available() else 0
         try:
             self.session_g2pW = onnxruntime.InferenceSession(
                 os.path.join(uncompress_path, "g2pW.onnx"),