diff --git a/src/babylon/concurrent/counter.h b/src/babylon/concurrent/counter.h
index 7592f4c..bda6f20 100644
--- a/src/babylon/concurrent/counter.h
+++ b/src/babylon/concurrent/counter.h
@@ -208,7 +208,7 @@ using ConcurrentMiner = GenericsConcurrentMiner<ssize_t>;
 class ConcurrentSummer {
  public:
   // 计数结果二元组，总和&总量
-  struct Summary {
+  struct alignas(BABYLON_CACHELINE_SIZE) Summary {
     ssize_t sum;
     size_t num;
   };