diff --git a/vllm_spyre/platform.py b/vllm_spyre/platform.py
index 6cfe47d0..2c82b67c 100644
--- a/vllm_spyre/platform.py
+++ b/vllm_spyre/platform.py
@@ -456,7 +456,8 @@ def _check_threading_config(cls, worker_count: int):
                 )
 
             for env in THREADING_ENVS:
-                os.environ[env] = str(cpus_per_worker)
+                if not os.environ.get(env):
+                    os.environ[env] = str(cpus_per_worker)
 
             logger.info(
                 "%s for %d workers. Since VLLM_SPYRE_UPDATE_THREAD_CONFIG is "