diff --git a/vllm/v1/core/sched/scheduler.py b/vllm/v1/core/sched/scheduler.py
index 5aa34040624f6..5b501a2f2a7ff 100644
--- a/vllm/v1/core/sched/scheduler.py
+++ b/vllm/v1/core/sched/scheduler.py
@@ -700,7 +700,7 @@ class Scheduler:
     def has_finished_requests(self) -> bool:
         return len(self.finished_req_ids) > 0
 
-    def has_requests(self):
+    def has_requests(self) -> bool:
         """Returns True if there are unfinished requests, or finished requests
         not yet returned in SchedulerOutputs."""
         return self.has_unfinished_requests() or self.has_finished_requests()