diff --git a/python/sglang/bench_serving.py b/python/sglang/bench_serving.py
index e2a99f9fd..69d175d84 100644
--- a/python/sglang/bench_serving.py
+++ b/python/sglang/bench_serving.py
@@ -990,7 +990,7 @@ if __name__ == "__main__":
         type=float,
         default=float("inf"),
         help="Number of requests per second. If this is inf, then all the requests are sent at time 0. "
-        "Otherwise, we use Poisson process to synthesize the request arrival times. Default is 128.0.",
+        "Otherwise, we use Poisson process to synthesize the request arrival times. Default is inf.",
     )
     parser.add_argument("--seed", type=int, default=1, help="The random seed.")
     parser.add_argument(