diff --git a/fastdeploy/engine/sched/resource_manager_v1.py b/fastdeploy/engine/sched/resource_manager_v1.py
index cdd86d1773f..ac61d5264a3 100644
--- a/fastdeploy/engine/sched/resource_manager_v1.py
+++ b/fastdeploy/engine/sched/resource_manager_v1.py
@@ -1079,8 +1079,6 @@ def preallocate_resource_in_d(self, request: Request):
         If can not, return False
         """
         assert self.config.scheduler_config.splitwise_role == "decode", "Only D instance can call this method"
-        if request.reasoning_max_tokens is not None:
-            request.reasoning_max_tokens -= 1
         request.need_prefill_tokens = len(request.prompt_token_ids)
         need_prealloc_prefill_blocks = (
             request.need_prefill_tokens + self.config.cache_config.block_size - 1