diff --git a/python/sglang/srt/dllm/mixin/scheduler.py b/python/sglang/srt/dllm/mixin/scheduler.py
index 1ca55c222..656355e20 100644
--- a/python/sglang/srt/dllm/mixin/scheduler.py
+++ b/python/sglang/srt/dllm/mixin/scheduler.py
@@ -60,7 +60,7 @@ class SchedulerDllmMixin:
 
     def _fetch_waiting_reqs(self: Scheduler):
         # Calculate how many requests can be added to DLLM manager
-        max_dllm_capacity = self.server_args.max_running_requests - len(
+        max_dllm_capacity = self.dllm_config.max_running_requests - len(
             self.dllm_manager.waiting_queue
         )
         num_requests_to_add = min(max_dllm_capacity, len(self.waiting_queue))