diff --git a/vllm/config/parallel.py b/vllm/config/parallel.py
index 0327832c4fb8..c02d0023485b 100644
--- a/vllm/config/parallel.py
+++ b/vllm/config/parallel.py
@@ -462,6 +462,7 @@ def compute_hash(self):
             # Derived/runtime topology, networking, or launch details
             "data_parallel_rank",
             "data_parallel_rank_local",
+            "data_parallel_size_local",
             "data_parallel_backend",
             "data_parallel_external_lb",
             "data_parallel_hybrid_lb",