diff --git a/vllm/benchmarks/serve_multi.py b/vllm/benchmarks/serve_multi.py
index f6f34a27fe2e4..b2d44d2b40ad0 100644
--- a/vllm/benchmarks/serve_multi.py
+++ b/vllm/benchmarks/serve_multi.py
@@ -130,8 +130,8 @@ def benchmark_one_comb(
             with open(result_path, "rb") as f:
                 run_data = json.load(f)
 
-            run_data.update(serve_comb)
             run_data["run_number"] = run_number
+            run_data.update(serve_comb)
 
             result_data.append(run_data)