diff --git a/python/sglang/srt/model_executor/cuda_graph_runner.py b/python/sglang/srt/model_executor/cuda_graph_runner.py
index 75f085ae4..bc2c4abb0 100644
--- a/python/sglang/srt/model_executor/cuda_graph_runner.py
+++ b/python/sglang/srt/model_executor/cuda_graph_runner.py
@@ -116,7 +116,7 @@ def get_batch_sizes_to_capture(model_runner: ModelRunner):
     if capture_bs is None:
         if server_args.speculative_algorithm is None:
             if server_args.disable_cuda_graph_padding:
-                capture_bs = list(range(1, 33)) + range(40, 161, 16)
+                capture_bs = list(range(1, 33)) + list(range(40, 161, 16))
             else:
                 capture_bs = [1, 2, 4, 8] + list(range(16, 161, 8))
         else: