diff --git a/be/src/pipeline/task_queue.h b/be/src/pipeline/task_queue.h
index e48deb517575db..b389ebc2c51517 100644
--- a/be/src/pipeline/task_queue.h
+++ b/be/src/pipeline/task_queue.h
@@ -147,7 +147,7 @@ class MultiCoreTaskQueue : public TaskQueue {
             int core_id, std::vector<std::unique_ptr<PriorityTaskQueue>>& prio_task_queue_list);
 
     std::shared_ptr<std::vector<std::unique_ptr<PriorityTaskQueue>>> _prio_task_queue_list;
-    std::atomic<int> _next_core = 0;
+    std::atomic<uint32_t> _next_core = 0;
     std::atomic<bool> _closed;
 };