diff --git a/src/storage/invertedindex/format/flush_info.cppm b/src/storage/invertedindex/format/flush_info.cppm
index 60e0e57448..1239403d75 100644
--- a/src/storage/invertedindex/format/flush_info.cppm
+++ b/src/storage/invertedindex/format/flush_info.cppm
@@ -14,10 +14,17 @@ private:
 public:
     FlushInfo() { Reset(); }
 
-    FlushInfo(const FlushInfo &other) { flush_info_ = other.flush_info_; }
+    FlushInfo(const FlushInfo &other) { flush_info_ = other.flush_info_.load(); }
 
     ~FlushInfo() = default;
 
+    FlushInfo &operator=(const FlushInfo &other) {
+        if (this != &other) {
+            flush_info_ = other.flush_info_.load();
+        }
+        return *this;
+    }
+
     bool IsValidPostingBuffer() const { return GET_BIT_VALUE(MASK_IS_VALID, OFFSET_IS_VALID); }
     void SetIsValidPostingBuffer(bool is_valid) {
         u64 is_valid_posting_buffer = is_valid ? 1 : 0;
@@ -38,7 +45,7 @@ public:
     static const u64 MASK_FLUSH_LENGTH = 0xFFFFFFFE;
     static const u64 MASK_FLUSH_COUNT = 0xFFFFFFFF00000000;
 
-    u64 volatile flush_info_;
+    Atomic<u64> flush_info_{};
 };
 
 } // namespace infinity
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